refactor(opstack): the operator stack is the only density path

Every strate now generates through its operator stack: authored
definitions, cooked-season entries (recipe or native) and editor
composer candidates alike. The per-strate opt-in and the archetype
switch it guarded are gone.

- Remove UVoxelStrateDefinition::bUseOperatorStack and the season
  wiring that set it; UsesOperatorStackForChunk now only says whether
  the slot has a known archetype.
- GetDensityAt always builds a stack (composer, then recipe, then the
  native archetype stack); a degenerate zero-height strate stays air.
- Remove the startup opt-in warning, the operator_stack startup-trace
  field and the four "Cave Bail Not Op Stack" stats (the remaining
  bail is counted by Cave Bail No Stack).
- Explore commandlet: drop -opstack and the operator_stack fields;
  VoxelForgeTest.ps1 no longer passes -opstack=1.
- Tests: FTestWorld::Build loses its bool parameter; legacy-vs-stack
  comparisons (MazeSeam, VerticalShaftSeam, TerrainDetailLiveness,
  WorldEdgeSeal, TilePostReach) collapse to the single stack path.

This changes terrain for any strate asset that did not already have
the opt-in ticked.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01URDGLsu7c4nunqNFPJEFPU

Source/VoxelForge/Private/Tests/VoxelForgeClassifyTileTest.cpp

@@ -39,12 +39,8 @@
 #include "Misc/AutomationTest.h"
 
 #include "VoxelForgeTestFixture.h"
-// Inclus ici DÉLIBÉRÉMENT : VoxelDensityOp.h n'est encore inclus par aucun .cpp, donc le
+// Le fold défini par VoxelDensityOp.h prétend reproduire ClassifyTile : ce fichier le teste.
-// compilateur ne le verrait jamais. Le fold qu'il définit prétend reproduire ClassifyTile — ce
+// The fold defined in VoxelDensityOp.h claims to reproduce ClassifyTile; this file tests it.
-// fichier est l'endroit naturel pour que cette prétention soit à la fois COMPILÉE et TESTÉE.
-// Deliberately included here: VoxelDensityOp.h is not yet included by any .cpp, so the compiler
-// would never see it. Its fold claims to reproduce ClassifyTile, so this is the natural place for
-// that claim to be both compiled and tested.
 #include "VoxelDensityOp.h"
 
 IMPLEMENT_SIMPLE_AUTOMATION_TEST(
@@ -153,7 +149,7 @@ bool FVoxelForgeClassifyTileTest::RunTest(const FString& Parameters)
 
     AddInfo(FString::Printf(
         TEXT("ClassifyTile verdicts over %d scanned tiles: Mixed %d, AllSolid %d, AllAir %d ")
-        TEXT("(brute-forcing %d of them). Cave archetypes now use the opt-in operator-stack ")
+        TEXT("(brute-forcing %d of them). Cave archetypes use the operator-stack ")
         TEXT("ClassifyBox fold; the global XY edge proof also skips proven outer-shell tiles. A low ")
         TEXT("non-Mixed count is expected: every uncertain case remains Mixed for safety."),
         NumTilesScanned, NumMixed, NumAllSolid, NumAllAir, ToVerify.Num()));
@@ -237,25 +233,24 @@ bool FVoxelForgeClassifyTileTest::RunTest(const FString& Parameters)
 }
 
 //=============================================================================
-// LE CHEMIN PILE D'OPÉRATEURS DE ClassifyTile — MÊME FORCE BRUTE, MONDE OPT-IN
+// LE CHEMIN PILE D'OPÉRATEURS DE ClassifyTile — MÊME FORCE BRUTE, STRATES DE CAVE
 //=============================================================================
-// `ClassifyTile` rendait `Mixed` sans appel pour tout archétype de CAVE. Il consulte désormais
+// Pour un slot de CAVE, `ClassifyTile` consulte `FVoxelOpStack::ClassifyBox` — donc **la pile peut
-// `FVoxelOpStack::ClassifyBox` quand la strate a coché `bUseOperatorStack` — donc **un tout nouveau
+// faire sauter le maillage d'une tuile**, et son erreur est un TROU : pas de triangles, pas de
-// chemin peut faire sauter le maillage d'une tuile**, et son erreur est un TROU : pas de triangles,
+// collision, invisible jusqu'à ce qu'un joueur tombe au travers.
-// pas de collision, invisible jusqu'à ce qu'un joueur tombe au travers.
 //
-// Ce test est le même oracle par force brute que `ClassifyTileSoundness`, sur un monde dont TOUTES
+// Ce test est le même oracle par force brute que `ClassifyTileSoundness`, avec un tirage uniforme
-// les strates ont coché la case. Il ne vérifie pas le pliage (c'est `BoxVerdictFold`) ni les
+// sur tout le layout. Il ne vérifie pas le pliage (c'est `BoxVerdictFold`) ni les opérateurs : il
-// opérateurs (ce sont les huit tests d'équivalence) : il vérifie le **câblage** — que la pile
+// vérifie le **câblage** — que la pile interrogée par le classifieur est bien celle qui produit la
-// interrogée par le classifieur est bien celle qui produit la densité, params, drapeau et
+// densité, params et disturbances compris.
-// disturbances compris.
 //
 // ⚠️ LE COMPTEUR À LIRE EN PREMIER est le nombre de tuiles réellement brute-forcées. Un run vert
 // avec zéro verdict non-Mixed ne prouverait RIEN — exactement le piège que ce fichier documente
 // depuis sa première version, et la raison pour laquelle l'absence de verdict est une ERREUR ici.
 //
-// Same brute-force oracle as ClassifyTileSoundness, on a world where every strate has opted in.
+// Same brute-force oracle as ClassifyTileSoundness, drawn uniformly over the whole layout so cave
-// It checks the WIRING, not the fold and not the operators.
+// slots (which classify through their stack) dominate. It checks the WIRING, not the fold and not
+// the operators.
 
 IMPLEMENT_SIMPLE_AUTOMATION_TEST(
     FVoxelForgeOpStackClassifyTileTest,
@@ -266,11 +261,10 @@ bool FVoxelForgeOpStackClassifyTileTest::RunTest(const FString& Parameters)
 {
     using namespace VoxelForgeTest;
 
-    // ⚠️ `bUseOperatorStack = true` sur toutes les strates : c'est LE point du test. La fixture
+    // La fixture donne à ce monde une `LayoutVersion` unique dans le processus, sans quoi les caches
-    // donne à ce monde une `LayoutVersion` unique dans le processus, sans quoi les caches par chunk
+    // par chunk de `GetDensityAt` — dont `CP_UseOpStack` — pourraient encore porter ceux d'un autre test.
-    // de `GetDensityAt` — dont `CP_UseOpStack` — pourraient encore porter ceux d'un autre test.
     FTestWorld World;
-    World.Build(/*Seed*/1337, /*GapChunks*/2, /*bUseOperatorStack*/true);
+    World.Build(/*Seed*/1337, /*GapChunks*/2);
     if (!World.IsValid())
     {
         AddError(World.WhyInvalid());
@@ -287,8 +281,8 @@ bool FVoxelForgeOpStackClassifyTileTest::RunTest(const FString& Parameters)
     const int32 BottomVoxelZ = World.BottomChunkZ * CHUNK_SIZE;
 
     // Tirage uniforme sur tout le layout, PAS biaisé vers SurfaceWorld comme l'autre test : ici ce
-    // sont précisément les strates de cave qui intéressent, puisque ce sont elles qui passent par le
+    // sont précisément les strates de cave qui intéressent, puisque ce sont elles que ClassifyTile
-    // nouveau chemin. SurfaceWorld continue d'être prouvé par le code écrit à la main.
+    // juge par leur pile. SurfaceWorld est prouvé par le test colonne écrit à la main.
     for (int32 t = 0; t < NumTilesScanned; ++t)
     {
         FTileSpec Spec;
@@ -316,20 +310,17 @@ bool FVoxelForgeOpStackClassifyTileTest::RunTest(const FString& Parameters)
 
     AddInfo(FString::Printf(
         TEXT("ClassifyTile ON THE OPERATOR-STACK PATH, %d scanned tiles: Mixed %d, AllSolid %d, ")
-        TEXT("AllAir %d (brute-forcing %d). Compare with VoxelForge.Determinism.ClassifyTileSoundness, ")
+        TEXT("AllAir %d (brute-forcing %d). Every cave-slot verdict is a tile the mesher skips on ")
-        TEXT("which runs the SAME scan on a world that has NOT opted in: every verdict beyond what ")
+        TEXT("the strength of the stack's ClassifyBox fold -- and a hole if the wiring is wrong, ")
-        TEXT("that test reports is a tile the mesher now skips and did not before. That difference ")
+        TEXT("which is what the brute force below is for."),
-        TEXT("IS the T1.d prize OPSTACK-PLAN has been aiming at -- and every one of those tiles is a ")
-        TEXT("hole if the wiring is wrong, which is what the brute force below is for."),
         NumTilesScanned, NumMixed, NumAllSolid, NumAllAir, ToVerify.Num()));
 
     if (ToVerify.Num() == 0)
     {
         AddError(TEXT("VACUOUS: not one tile got a non-Mixed verdict on the operator-stack path, so ")
-                 TEXT("this test verified NOTHING about the new wiring. Either no strate actually ")
+                 TEXT("this test verified NOTHING about the wiring. Every guard in the cave branch ")
-                 TEXT("opted in (check FTestWorld::Build's bUseOperatorStack), or every guard in the ")
+                 TEXT("of ClassifyTile bailed to Mixed -- the params-identical check and the ")
-                 TEXT("cave branch of ClassifyTile bailed to Mixed -- the params-identical check and ")
+                 TEXT("27-chunk-coord cap are the likeliest. Do NOT read a green run as proof."));
-                 TEXT("the 27-chunk-coord cap are the likeliest. Do NOT read a green run as proof."));
         return false;
     }
 

Source/VoxelForge/Private/Tests/VoxelForgeComposerCorpusFreeTest.cpp

@@ -356,7 +356,7 @@ bool FVoxelForgeComposerCorpusFreeTest::RunTest(const FString& Parameters)
               Corpus.GetEntries().Num(), 12);
 
     FTestWorld World;
-    World.Build(1337, 2, true);
+    World.Build(1337, 2);
     if (!World.IsValid())
     {
         AddError(World.WhyInvalid());

Source/VoxelForge/Private/Tests/VoxelForgeComposerParameterRollTest.cpp

@@ -955,7 +955,7 @@ bool FVoxelForgeComposerParameterRollTest::RunTest(const FString& Parameters)
     }
 
     FTestWorld World;
-    World.Build(1337, 2, true);
+    World.Build(1337, 2);
     if (!World.IsValid())
     {
         AddError(World.WhyInvalid());
@@ -1117,7 +1117,6 @@ bool FVoxelForgeComposerParameterRollTest::RunTest(const FString& Parameters)
         CandidateDefinition->SurfaceParams = Roll.ArchetypeParams.SurfaceParams;
         CandidateDefinition->VerticalShaftParams = Roll.ArchetypeParams.VerticalShaftParams;
         CandidateDefinition->FloatingIslandParams = Roll.ArchetypeParams.FloatingIslandParams;
-        CandidateDefinition->bUseOperatorStack = true;
         CandidateDefinition->TransitionType = EVoxelStrateTransition::Hard;
         World.Reinitialize();
 
@@ -1342,15 +1341,13 @@ bool FVoxelForgeTerrainDetailLivenessTest::RunTest(const FString& Parameters)
     constexpr int32 ExpectedLatticeSamples = 16 * 16 * 16;
     FString Table = TEXT(
         "TERRAIN DETAIL LIVENESS (same 4096-point lattice; only one group changed per row)\n"
-        "path | group | samples | baseline digest | variant digest | baseline mean | variant mean | "
+        "group | samples | baseline digest | variant digest | baseline mean | variant mean | "
         "changed | sign changes | sum abs delta | max abs delta | verdict\n");
     int32 TotalRows = 0;
     int32 FailedRows = 0;
 
-    for (const bool bUseOperatorStack : { false, true })
-    {
     FTestWorld World;
-        World.Build(1337, 2, bUseOperatorStack);
+    World.Build(1337, 2);
     if (!World.IsValid())
     {
         AddError(World.WhyInvalid());
@@ -1365,17 +1362,11 @@ bool FVoxelForgeTerrainDetailLivenessTest::RunTest(const FString& Parameters)
         return false;
     }
     Definition->TerrainOperations.Reset();
-        TestEqual(
+    TestEqual(TEXT("fixture has no terrain-op asset pool"), Definition->TerrainOperations.Num(), 0);
-            FString::Printf(TEXT("%s fixture has no terrain-op asset pool"),
-                            bUseOperatorStack ? TEXT("operator-stack") : TEXT("legacy")),
-            Definition->TerrainOperations.Num(), 0);
 
     TArray<FVector> Points;
     VF_BuildTerrainDetailLattice(World, Points);
-        TestEqual(
+    TestEqual(TEXT("experiment uses the fixed lattice"), Points.Num(), ExpectedLatticeSamples);
-            FString::Printf(TEXT("%s experiment uses the fixed lattice"),
-                            bUseOperatorStack ? TEXT("operator-stack") : TEXT("legacy")),
-            Points.Num(), ExpectedLatticeSamples);
 
     FStrateGenerationParams BaselineParams = Definition->GenerationParams;
     VF_ClearTerrainDetailFields(BaselineParams);
@@ -1403,9 +1394,7 @@ bool FVoxelForgeTerrainDetailLivenessTest::RunTest(const FString& Parameters)
                 bSameBaseline = BitEqual(FirstBaseline[SampleIndex], BaselineSamples[SampleIndex]);
             }
             TestTrue(
-                    FString::Printf(TEXT("%s baseline is stable before %s probe"),
+                FString::Printf(TEXT("baseline is stable before %s probe"), Spec.Name),
-                                    bUseOperatorStack ? TEXT("operator-stack") : TEXT("legacy"),
-                                    Spec.Name),
                 bSameBaseline);
         }
 
@@ -1428,14 +1417,11 @@ bool FVoxelForgeTerrainDetailLivenessTest::RunTest(const FString& Parameters)
             ++FailedRows;
         }
         TestTrue(
-                FString::Printf(TEXT("%s %s field group has the measured liveness verdict"),
+            FString::Printf(TEXT("%s field group has the measured liveness verdict"), Spec.Name),
-                                bUseOperatorStack ? TEXT("operator-stack") : TEXT("legacy"),
-                                Spec.Name),
             bVerdictMatches);
 
         Table += FString::Printf(
-                TEXT("%s | %s | %d | 0x%08x | 0x%08x | %.9g | %.9g | %d | %d | %.9g | %.9g | %s\n"),
+            TEXT("%s | %d | 0x%08x | 0x%08x | %.9g | %.9g | %d | %d | %.9g | %.9g | %s\n"),
-                bUseOperatorStack ? TEXT("operator-stack") : TEXT("legacy"),
             Spec.Name,
             Points.Num(),
             BaselineSummary.Digest,
@@ -1448,17 +1434,16 @@ bool FVoxelForgeTerrainDetailLivenessTest::RunTest(const FString& Parameters)
             Delta.MaxAbs,
             bObservedLive ? TEXT("LIVE") : TEXT("DEAD"));
     }
-    }
 
     AddInfo(Table);
     AddInfo(FString::Printf(
-        TEXT("Terrain detail liveness: %d group/path rows measured, %d mismatches; LIVE groups "
+        TEXT("Terrain detail liveness: %d group rows measured, %d mismatches; LIVE groups "
              "must have at least one bit-changed density and DEAD groups must have none. No "
              "terrain-operation assets were present in the fixture pool."),
         TotalRows, FailedRows));
     TestEqual(TEXT("all terrain detail liveness rows matched their measured verdict"), FailedRows, 0);
-    TestEqual(TEXT("both density paths measured every terrain detail group"), TotalRows,
+    TestEqual(TEXT("every terrain detail group was measured"), TotalRows,
-              static_cast<int32>(2 * UE_ARRAY_COUNT(GTerrainDetailProbeSpecs)));
+              static_cast<int32>(UE_ARRAY_COUNT(GTerrainDetailProbeSpecs)));
     return FailedRows == 0;
 }
 

Source/VoxelForge/Private/Tests/VoxelForgeComposerPromotionTest.cpp

@@ -394,7 +394,7 @@ bool FVoxelForgeComposerPromotionTest::RunTest(const FString& Parameters)
     }
 
     FTestWorld World;
-    World.Build(1337, 2, true);
+    World.Build(1337, 2);
     if (!World.IsValid())
     {
         AddError(World.WhyInvalid());

Source/VoxelForge/Private/Tests/VoxelForgeComposerShowcaseTest.cpp

@@ -1590,7 +1590,7 @@ bool FVoxelForgeComposerShowcaseTest::RunTest(const FString& Parameters)
     FTestWorld World;
     // The shared fixture defaults to a bounded 4-chunk volume for fast density tests. The
     // owner-facing scale audit must exercise the production/default 8-chunk envelope.
-    World.Build(BaseComposerSeed, 2, true, 8);
+    World.Build(BaseComposerSeed, 2, 8);
     if (!World.IsValid())
     {
         AddError(World.WhyInvalid());

Source/VoxelForge/Private/Tests/VoxelForgeComposerStructureRollTest.cpp

@@ -262,7 +262,7 @@ bool FVoxelForgeComposerStructureRollTest::RunTest(const FString& Parameters)
     }
 
     FTestWorld World;
-    World.Build(1337, 2, true);
+    World.Build(1337, 2);
     if (!World.IsValid())
     {
         AddError(World.WhyInvalid());

Source/VoxelForge/Private/Tests/VoxelForgeCorrectnessRoundTest.cpp

@@ -132,7 +132,7 @@ IMPLEMENT_SIMPLE_AUTOMATION_TEST(
 bool FVoxelForgeTileCacheContextDeterminismTest::RunTest(const FString& Parameters)
 {
     FTestWorld World;
-    World.Build(/*Seed*/1337, /*GapChunks*/2, /*bUseOperatorStack*/true);
+    World.Build(/*Seed*/1337, /*GapChunks*/2);
     if (!World.IsValid())
     {
         AddError(World.WhyInvalid());
@@ -208,8 +208,8 @@ bool FVoxelForgeTileCacheContextDeterminismTest::RunTest(const FString& Paramete
     // level-0 tile at the same origin is compared with a fresh world's level-0 output.
     FTestWorld WarmWorld;
     FTestWorld FreshWorld;
-    WarmWorld.Build(/*Seed*/1337, /*GapChunks*/2, /*bUseOperatorStack*/true);
+    WarmWorld.Build(/*Seed*/1337, /*GapChunks*/2);
-    FreshWorld.Build(/*Seed*/1337, /*GapChunks*/2, /*bUseOperatorStack*/true);
+    FreshWorld.Build(/*Seed*/1337, /*GapChunks*/2);
     if (!WarmWorld.IsValid() || !FreshWorld.IsValid())
     {
         AddError(WarmWorld.IsValid() && FreshWorld.IsValid()

Source/VoxelForge/Private/Tests/VoxelForgeDensityBlockEquivalenceTest.cpp

@@ -348,7 +348,7 @@ bool FVoxelForgeDensityBlockEquivalenceTest::RunTest(const FString& Parameters)
     for (int32 SeedIndex = 0; SeedIndex < UE_ARRAY_COUNT(Seeds); ++SeedIndex)
     {
         VoxelForgeTest::FTestWorld World;
-        World.Build(Seeds[SeedIndex], /*gap chunks=*/2, /*operator stack=*/true);
+        World.Build(Seeds[SeedIndex], /*gap chunks=*/2);
         if (!World.IsValid())
         {
             AddError(World.WhyInvalid());
@@ -470,8 +470,8 @@ bool FVoxelForgeDensityBlockEquivalenceTest::RunTest(const FString& Parameters)
 
         // No-edit grids. In the two canonical network archetypes this enters the actual worker
         // block session, which partitions each mesher grid by resolved chunk before running the
-        // active operator list. The six legacy density routes still run their production scalar
+        // active operator list. The six other archetypes run the scalar stack evaluator, as they
-        // evaluator, as they do outside the block-safe network branch.
+        // do in production outside the block-safe network branch.
         for (int32 GridIndex = 0; GridIndex < GridSetCount; ++GridIndex)
         {
             BaseResults[GridIndex] = CompareGeneratorBlockWithScalar(

Source/VoxelForge/Private/Tests/VoxelForgeDescentCorridorTest.cpp

@@ -761,14 +761,13 @@ namespace
             const float SimulatedCarvedFinalDensity = -SimulatedCarvedInternalDensity;
             UE_LOG(LogTemp, Display,
                 TEXT("[VoxelForgeDescentWriterContext] seed=0 sample=(%.3f,%.3f,%.3f) "
-                     "chunk=(%d,%d,%d) archetype=%s asset_stack_flag=%d effective_op_stack=%d "
+                     "chunk=(%d,%d,%d) archetype=%s effective_op_stack=%d "
                      "passage_sdf=%.6f simulated_passage_carve_density=%.6f "
                      "terrain_ops='%s' terrain_op_paths='%s' "
                      "base=%.3f tunnel_columns=(%.3f,%.3f,%.3f) slab_columns=(%.3f,%.3f,%.3f)"),
                 OutSamples.FirstSolidPosition.X, OutSamples.FirstSolidPosition.Y,
                 OutSamples.FirstSolidPosition.Z, ChunkCoord.X, ChunkCoord.Y, ChunkCoord.Z,
-                *GeneratorName, Definition != nullptr && Definition->bUseOperatorStack ? 1 : 0,
+                *GeneratorName, bUsesOperatorStack ? 1 : 0, PassageSDF, SimulatedCarvedFinalDensity,
-                bUsesOperatorStack ? 1 : 0, PassageSDF, SimulatedCarvedFinalDensity,
                 *TerrainOps, *TerrainOpPaths, Params.BaseDensity, Params.ColumnDensity,
                 Params.ColumnMinRadius, Params.ColumnMaxRadius,
                 Definition != nullptr ? Definition->SlabParams.ColumnDensity : -1.0f,

Source/VoxelForge/Private/Tests/VoxelForgeLateralRegionsTest.cpp

@@ -549,7 +549,7 @@ bool FVoxelForgeLateralRegionsTest::RunTest(const FString& Parameters)
         }
 
         FTestWorld World;
-        World.Build(Seed, 2, false);
+        World.Build(Seed, 2);
         int32 TopWorldZ = 0;
         int32 BottomWorldZ = 0;
         FVoxelStrateRegionManifest Manifest;
@@ -612,7 +612,7 @@ bool FVoxelForgeLateralRegionsTest::RunTest(const FString& Parameters)
         }
 
         FTestWorld World;
-        World.Build(Seed, 2, false);
+        World.Build(Seed, 2);
         int32 TopWorldZ = 0;
         int32 BottomWorldZ = 0;
         FVoxelStrateRegionManifest Manifest;
@@ -661,7 +661,7 @@ bool FVoxelForgeLateralRegionsTest::RunTest(const FString& Parameters)
     TestTrue(TEXT("found a single-region recipe identity case"), bRecipeIdentityChecked);
 
     FTestWorld World;
-    World.Build(MultiSeed, 2, false);
+    World.Build(MultiSeed, 2);
     if (!World.IsValid())
     {
         AddError(World.WhyInvalid());
@@ -955,7 +955,7 @@ bool FVoxelForgeLateralRegionsTest::RunTest(const FString& Parameters)
         }
 
         FTestWorld LawWorld;
-        LawWorld.Build(Seed, 2, false);
+        LawWorld.Build(Seed, 2);
         FVoxelStrateRegionManifest LawManifest;
         FVoxelOpStack LawStack;
         FVoxelOpContext LawContext;

Source/VoxelForge/Private/Tests/VoxelForgeMazeSeamTest.cpp

@@ -100,65 +100,44 @@ bool FVoxelForgeMazeSeamTest::RunTest(const FString& Parameters)
 {
     using namespace VoxelForgeTest;
 
-    FTestWorld LegacyWorld;
+    FTestWorld World;
-    LegacyWorld.Build(7331, 2, false, 4);
+    World.Build(7331, 2, 4);
-    FTestWorld StackWorld;
+    if (!World.IsValid())
-    StackWorld.Build(7331, 2, true, 4);
-    if (!LegacyWorld.IsValid() || !StackWorld.IsValid())
     {
-        AddError(LegacyWorld.IsValid() ? StackWorld.WhyInvalid() : LegacyWorld.WhyInvalid());
+        AddError(World.WhyInvalid());
         return false;
     }
 
-    int32 LegacyTop = 0, LegacyBottom = 0;
+    int32 Top = 0, Bottom = 0;
-    int32 StackTop = 0, StackBottom = 0;
+    if (!World.GetSlotVoxelZRange(FTestWorld::SlotMaze, Top, Bottom))
-    if (!LegacyWorld.GetSlotVoxelZRange(FTestWorld::SlotMaze, LegacyTop, LegacyBottom)
-        || !StackWorld.GetSlotVoxelZRange(FTestWorld::SlotMaze, StackTop, StackBottom))
     {
         AddError(TEXT("The seam fixture has no Maze slot."));
         return false;
     }
-    const int32 LegacyMidChunkZ = ((LegacyTop + LegacyBottom) / 2) / CHUNK_SIZE;
+    const int32 MidChunkZ = ((Top + Bottom) / 2) / CHUNK_SIZE;
-    const int32 StackMidChunkZ = ((StackTop + StackBottom) / 2) / CHUNK_SIZE;
+    const FMazeGenerationParams Params = World.StrateManager->GetMazeParamsForChunk(
-    const FMazeGenerationParams LegacyParams = LegacyWorld.StrateManager->GetMazeParamsForChunk(
+        FIntVector(0, 0, MidChunkZ));
-        FIntVector(0, 0, LegacyMidChunkZ));
-    const FMazeGenerationParams StackParams = StackWorld.StrateManager->GetMazeParamsForChunk(
-        FIntVector(0, 0, StackMidChunkZ));
 
-    TArray<FVector> LegacyProbes;
+    TArray<FVector> Probes;
-    TArray<FVector> StackProbes;
+    AddMazeBoundaryProbes(Params, Bottom, Top, Probes);
-    AddMazeBoundaryProbes(LegacyParams, LegacyBottom, LegacyTop, LegacyProbes);
-    AddMazeBoundaryProbes(StackParams, StackBottom, StackTop, StackProbes);
-    TestEqual(TEXT("legacy and operator seam tests have the same probe count"),
-              LegacyProbes.Num(), StackProbes.Num());
 
-    int32 LegacyFirst = INDEX_NONE, StackFirst = INDEX_NONE;
+    int32 First = INDEX_NONE;
-    float LegacyBefore = 0.0f, LegacyAfter = 0.0f;
+    float Before = 0.0f, After = 0.0f;
-    float StackBefore = 0.0f, StackAfter = 0.0f;
+    const int32 Mismatches = CountContextMismatches(World, Probes, First, Before, After);
-    const int32 LegacyMismatches = CountContextMismatches(
-        LegacyWorld, LegacyProbes, LegacyFirst, LegacyBefore, LegacyAfter);
-    const int32 StackMismatches = CountContextMismatches(
-        StackWorld, StackProbes, StackFirst, StackBefore, StackAfter);
 
-    TestEqual(TEXT("legacy Maze has no chunk-context seam mismatches"), LegacyMismatches, 0);
+    TestEqual(TEXT("Maze has no chunk-context seam mismatches"), Mismatches, 0);
-    TestEqual(TEXT("operator-stack Maze has no chunk-context seam mismatches"), StackMismatches, 0);
+    TestTrue(TEXT("Maze seam test sampled cell-boundary probes"), Probes.Num() > 0);
-    TestTrue(TEXT("Maze seam test sampled cell-boundary probes"), LegacyProbes.Num() > 0);
 
-    if (LegacyFirst != INDEX_NONE)
+    if (First != INDEX_NONE)
     {
-        AddError(FString::Printf(TEXT("Legacy Maze seam mismatch at probe %d: %.9g -> %.9g"),
+        AddError(FString::Printf(TEXT("Maze seam mismatch at probe %d: %.9g -> %.9g"),
-                                 LegacyFirst, LegacyBefore, LegacyAfter));
+                                 First, Before, After));
-    }
-    if (StackFirst != INDEX_NONE)
-    {
-        AddError(FString::Printf(TEXT("Operator Maze seam mismatch at probe %d: %.9g -> %.9g"),
-                                 StackFirst, StackBefore, StackAfter));
     }
 
     AddInfo(FString::Printf(
-        TEXT("Maze seam freedom: %d boundary probes, legacy mismatches=%d, operator mismatches=%d; "
+        TEXT("Maze seam freedom: %d boundary probes, mismatches=%d; "
              "local window=2x2x2 child nodes ({-1,0}^3), no wide collect."),
-        LegacyProbes.Num(), LegacyMismatches, StackMismatches));
+        Probes.Num(), Mismatches));
     return true;
 }
 
@@ -175,7 +154,7 @@ bool FVoxelForgeCaveWarpTileLodSeamTest::RunTest(const FString& Parameters)
     using namespace VoxelForgeTest;
 
     FTestWorld World;
-    World.Build(1337, 2, true, 4);
+    World.Build(1337, 2, 4);
     if (!World.IsValid())
     {
         AddError(World.WhyInvalid());

Source/VoxelForge/Private/Tests/VoxelForgeOpStackChannelTest.cpp

@@ -90,9 +90,8 @@ bool FVoxelForgeOpStackChannelTest::RunTest(const FString& Parameters)
         TestTrue(*FString::Printf(TEXT("%s shipping stack has a legal channel DAG"), Name), bValid);
     };
 
-    // These are the eight builders currently shipped behind bUseOperatorStack. Keep the
+    // These are the eight shipped archetype builders. Keep the archetype list explicit so adding
-    // archetype list explicit so adding a builder without adding its validator assertion is
+    // a builder without adding its validator assertion is visible in this test.
-    // visible in this test.
     int32 MidChunkZ = 0;
 
     if (MidChunkForSlot(FTestWorld::SlotTunnelNetwork, TEXT("TunnelNetwork"), MidChunkZ))

Source/VoxelForge/Private/Tests/VoxelForgeScaleDiagnosisTest.cpp

@@ -140,7 +140,6 @@ namespace
         Definition->SurfaceParams = Candidate.ArchetypeParams.SurfaceParams;
         Definition->VerticalShaftParams = Candidate.ArchetypeParams.VerticalShaftParams;
         Definition->FloatingIslandParams = Candidate.ArchetypeParams.FloatingIslandParams;
-        Definition->bUseOperatorStack = true;
         Definition->TransitionType = EVoxelStrateTransition::Hard;
         World.Reinitialize();
     }
@@ -869,7 +868,7 @@ bool FVoxelForgeScaleDiagnosisTest::RunTest(const FString& Parameters)
     // Resolve every probe from the current corpus. This keeps the diagnosis attached to real
     // single-region candidates without making a corpus asset edit look like a geometry failure.
     FTestWorld World;
-    World.Build(DiagnosisSeed, 2, true, 8);
+    World.Build(DiagnosisSeed, 2, 8);
     if (!World.IsValid())
     {
         AddError(World.WhyInvalid());

Source/VoxelForge/Private/Tests/VoxelForgeSealedSolidProofTest.cpp

@@ -64,8 +64,7 @@ bool FVoxelForgeSealedSolidProofTest::RunTest(const FString& Parameters)
     // Forty voxels makes a complete 32-cell level-0 tile fit inside a bottom boundary seal.  The
     // production asset remains untouched; this is a transient proof-only fixture configuration.
     FTestWorld World;
-    World.Build(/*Seed*/1337, /*GapChunks*/2, /*bUseOperatorStack*/false,
+    World.Build(/*Seed*/1337, /*GapChunks*/2, /*InStrateHeightInChunks*/8);
-                /*InStrateHeightInChunks*/8);
     if (!World.IsValid())
     {
         AddError(World.WhyInvalid());

Source/VoxelForge/Private/Tests/VoxelForgeStrateConnectivityTest.cpp

@@ -1325,20 +1325,12 @@ bool FVoxelForgeVerticalShaftSeamTest::RunTest(const FString& Parameters)
 {
     using namespace VoxelForgeTest;
 
-    bool bAllChecksPassed = true;
-    FString Summary = TEXT("VerticalShafts seam-freedom check (cell-boundary probes with two "
-                          "neighbouring chunk-context orders):\n");
-    for (const bool bUseOperatorStack : { false, true })
-    {
     FTestWorld World;
-        World.Build(/*InSeed=*/1337, /*InGapChunks=*/2, bUseOperatorStack);
+    World.Build(/*InSeed=*/1337, /*InGapChunks=*/2);
     if (!World.IsValid())
     {
-            AddError(FString::Printf(
+        AddError(TEXT("HARD FAILURE: could not build the seam-test fixture."));
-                TEXT("HARD FAILURE: could not build the %s seam-test fixture."),
+        return false;
-                bUseOperatorStack ? TEXT("operator-stack") : TEXT("legacy")));
-            bAllChecksPassed = false;
-            continue;
     }
 
     int32 Checked = 0;
@@ -1346,33 +1338,25 @@ bool FVoxelForgeVerticalShaftSeamTest::RunTest(const FString& Parameters)
     FString FirstMismatch;
     if (!CheckVerticalShaftSeams(World, Checked, Mismatches, FirstMismatch))
     {
-            AddError(FString::Printf(
+        AddError(TEXT("HARD FAILURE: the seam test sampled no VerticalShafts positions."));
-                TEXT("HARD FAILURE: the %s seam test sampled no VerticalShafts positions."),
+        return false;
-                bUseOperatorStack ? TEXT("operator-stack") : TEXT("legacy")));
-            bAllChecksPassed = false;
-            continue;
     }
 
-        Summary += FString::Printf(
+    AddInfo(FString::Printf(
-            TEXT("  %s path: %d same-position re-evaluations, %d bit mismatches%s%s.\n"),
+        TEXT("VerticalShafts seam-freedom check (cell-boundary probes with two neighbouring "
-            bUseOperatorStack ? TEXT("operator-stack") : TEXT("legacy"),
+             "chunk-context orders): %d same-position re-evaluations, %d bit mismatches%s%s."),
         Checked,
         Mismatches,
         Mismatches > 0 ? TEXT("; first ") : TEXT(""),
-            Mismatches > 0 ? *FirstMismatch : TEXT(""));
+        Mismatches > 0 ? *FirstMismatch : TEXT("")));
     if (Mismatches != 0)
     {
         AddError(FString::Printf(
-                TEXT("SEAM: %s VerticalShafts density changed after different chunk-context "
+            TEXT("SEAM: VerticalShafts density changed after different chunk-context orders: %s"),
-                     "orders: %s"),
-                bUseOperatorStack ? TEXT("operator-stack") : TEXT("legacy"),
             *FirstMismatch));
-            bAllChecksPassed = false;
+        return false;
     }
-    }
+    return true;
-
-    AddInfo(Summary);
-    return bAllChecksPassed;
 }
 
 bool FVoxelForgeStrateConnectivityTest::RunTest(const FString& Parameters)

Source/VoxelForge/Private/Tests/VoxelForgeTestFixture.h

@@ -6,9 +6,9 @@
 // ---------------
 // The interesting invariants (density purity across worker threads, ClassifyTile soundness)
 // only fire on the REAL path — UVoxelGenerator::GetDensityAt — because that is where the
-// thread_local per-chunk caches live (CP_*, GSurfColCache, the diff slots, the SDF cache).
+// thread_local per-chunk caches live (CP_*, the prepared stacks, the diff slots, the SDF cache).
-// Calling GetSurfaceDensity / GetMazeDensity directly bypasses every one of them and would
+// Evaluating a stack directly bypasses every one of them and would test almost nothing.
-// test almost nothing. GetDensityAt in turn needs a live UVoxelStrateManager, whose only
+// GetDensityAt in turn needs a live UVoxelStrateManager, whose only
 // entry point is Initialize(UVoxelSettings*, int32) reading TSoftObjectPtr pools.
 //
 // So the fixture builds a whole synthetic world in memory: transient strate definitions →
@@ -46,7 +46,7 @@ namespace VoxelForgeTest
      * generator + diff layer. No AActor, no UWorld, no PIE.
      *
      * The default layout stacks one strate of EVERY archetype (in ECaveGeneratorType order),
-     * so a single fixture exercises all eight density functions and their per-chunk caches,
+     * so a single fixture exercises all eight archetype stacks and their per-chunk caches,
      * plus the gap-bedrock path when InterStrateGapChunks > 0.
      */
     struct FTestWorld
@@ -73,8 +73,7 @@ namespace VoxelForgeTest
          * dangerous — and `VoxelForge.Determinism.LargeSeedSurvives` deliberately passes big ones
          * (up to 2e9) to prove it stays that way.
          */
-        void Build(int32 InSeed = 1337, int32 InGapChunks = 2, bool bUseOperatorStack = false,
+        void Build(int32 InSeed = 1337, int32 InGapChunks = 2, int32 InStrateHeightInChunks = 4)
-                   int32 InStrateHeightInChunks = 4)
         {
             Settings = TStrongObjectPtr<UVoxelSettings>(
                 NewObject<UVoxelSettings>(GetTransientPackage(), NAME_None, RF_Transient));
@@ -111,10 +110,6 @@ namespace VoxelForgeTest
                 // refinement and roll tests use the smaller synthetic volume as a bounded memory
                 // control; the owner-facing showcase opts into 8 chunks below.
                 Def->StrateHeightInChunks = FMath::Max(1, InStrateHeightInChunks);
-                // L'OPT-IN de la pile d'opérateurs. Faux par défaut : les treize tests existants
-                // doivent continuer à exercer le `switch`, qui reste le comportement de référence.
-                // Seul le test de solidité de ClassifyTie côté pile le passe à vrai.
-                Def->bUseOperatorStack = bUseOperatorStack;
                 // Hard transitions: param blending across a boundary would make "which archetype
                 // owns this chunk" ambiguous, and these tests want an unambiguous mapping.
                 Def->TransitionType = EVoxelStrateTransition::Hard;

Source/VoxelForge/Private/Tests/VoxelForgeTilePostReachTest.cpp

@@ -154,72 +154,50 @@ bool FVoxelForgeTilePostReachProofTest::RunTest(const FString& Parameters)
         return false;
     }
 
-    FTestWorld NativeWorld;
+    FTestWorld World;
-    NativeWorld.Build(/*Seed*/1337, /*GapChunks*/2, /*bUseOperatorStack*/false);
+    World.Build(/*Seed*/1337, /*GapChunks*/2);
-    FTestWorld FusedWorld;
+    if (!World.IsValid())
-    FusedWorld.Build(/*Seed*/1337, /*GapChunks*/2, /*bUseOperatorStack*/true);
-    if (!NativeWorld.IsValid() || !FusedWorld.IsValid())
     {
-        AddError(NativeWorld.IsValid() && FusedWorld.IsValid()
+        AddError(World.WhyInvalid());
-            ? TEXT("Unexpected invalid reach-proof fixture")
-            : (!NativeWorld.IsValid() ? NativeWorld.WhyInvalid() : FusedWorld.WhyInvalid()));
         return false;
     }
 
-    TArray<FIntVector> NativeOrigins;
+    TArray<FIntVector> Origins;
-    TArray<FIntVector> FusedOrigins;
+    AppendWorldReachTiles(World, Origins);
-    AppendWorldReachTiles(NativeWorld, NativeOrigins);
+    TestTrue(TEXT("the representative tile set is non-empty"), Origins.Num() > 0);
-    AppendWorldReachTiles(FusedWorld, FusedOrigins);
-    TestTrue(TEXT("the representative native tile set is non-empty"), NativeOrigins.Num() > 0);
-    TestTrue(TEXT("the representative fused tile set is non-empty"), FusedOrigins.Num() > 0);
 
-    TStrongObjectPtr<UVoxelMarchingCubesMesher> NativeMesher(
+    TStrongObjectPtr<UVoxelMarchingCubesMesher> Mesher(
         NewObject<UVoxelMarchingCubesMesher>(GetTransientPackage(), NAME_None, RF_Transient));
-    TStrongObjectPtr<UVoxelMarchingCubesMesher> FusedMesher(
+    Mesher->SetGenerator(World.Generator.Get());
-        NewObject<UVoxelMarchingCubesMesher>(GetTransientPackage(), NAME_None, RF_Transient));
-    NativeMesher->SetGenerator(NativeWorld.Generator.Get());
-    FusedMesher->SetGenerator(FusedWorld.Generator.Get());
 
     VoxelGenLOD::ResetTilePostReachDiagnostics();
     CVarGuard.SetScale(1.0f);
-    const FReachSnapshot NativeFull = RunReachTiles(*NativeMesher, NativeOrigins);
+    const FReachSnapshot Full = RunReachTiles(*Mesher, Origins);
-    const FReachSnapshot FusedFull = RunReachTiles(*FusedMesher, FusedOrigins);
-    const uint64 FullFinalComparisons = NativeFull.FinalComparisons + FusedFull.FinalComparisons;
-    const uint64 FullFinalDifferences = NativeFull.FinalDifferences + FusedFull.FinalDifferences;
     TestTrue(TEXT("normal reach compares final fields on the representative tiles"),
-             FullFinalComparisons > 0);
+             Full.FinalComparisons > 0);
-    TestEqual(TEXT("normal reach has no final-field differences"), FullFinalDifferences, 0ull);
+    TestEqual(TEXT("normal reach has no final-field differences"), Full.FinalDifferences, 0ull);
-    TestEqual(TEXT("normal reach has no skipped-post differences"),
+    TestEqual(TEXT("normal reach has no skipped-post differences"), Full.AllDifferences, 0ull);
-              NativeFull.AllDifferences + FusedFull.AllDifferences, 0ull);
 
     VoxelGenLOD::ResetTilePostReachDiagnostics();
     // Use a deliberately tiny but valid scale so at least one envelope is rejected while the same
     // final-field samples remain exercised; this is the negative control, not a supported setting.
     CVarGuard.SetScale(0.01f);
-    const FReachSnapshot NativeShrunk = RunReachTiles(*NativeMesher, NativeOrigins);
+    const FReachSnapshot Shrunk = RunReachTiles(*Mesher, Origins);
-    const FReachSnapshot FusedShrunk = RunReachTiles(*FusedMesher, FusedOrigins);
-    const uint64 ShrunkFinalComparisons =
-        NativeShrunk.FinalComparisons + FusedShrunk.FinalComparisons;
-    const uint64 ShrunkFinalDifferences =
-        NativeShrunk.FinalDifferences + FusedShrunk.FinalDifferences;
     TestTrue(TEXT("shrunk reach still executes final-field comparisons"),
-             ShrunkFinalComparisons > 0);
+             Shrunk.FinalComparisons > 0);
     TestTrue(TEXT("shrunk reach demonstrably fails the final-field proof"),
-             ShrunkFinalDifferences > 0);
+             Shrunk.FinalDifferences > 0);
 
     AddInfo(FString::Printf(
-        TEXT("tile_post_reach_proof: native_tiles=%llu fused_tiles=%llu full_final=%llu/%llu "
+        TEXT("tile_post_reach_proof: tiles=%llu full_final=%llu/%llu shrunk_final=%llu/%llu "
-             "shrunk_final=%llu/%llu native_samples=%lld/%lld fused_samples=%lld/%lld."),
+             "samples=%lld/%lld."),
-        static_cast<unsigned long long>(NativeFull.Tiles),
+        static_cast<unsigned long long>(Full.Tiles),
-        static_cast<unsigned long long>(FusedFull.Tiles),
+        static_cast<unsigned long long>(Full.FinalComparisons),
-        static_cast<unsigned long long>(FullFinalComparisons),
+        static_cast<unsigned long long>(Full.FinalDifferences),
-        static_cast<unsigned long long>(FullFinalDifferences),
+        static_cast<unsigned long long>(Shrunk.FinalComparisons),
-        static_cast<unsigned long long>(ShrunkFinalComparisons),
+        static_cast<unsigned long long>(Shrunk.FinalDifferences),
-        static_cast<unsigned long long>(ShrunkFinalDifferences),
+        static_cast<long long>(Full.DensitySamples),
-        static_cast<long long>(NativeFull.DensitySamples),
+        static_cast<long long>(Shrunk.DensitySamples)));
-        static_cast<long long>(NativeShrunk.DensitySamples),
-        static_cast<long long>(FusedFull.DensitySamples),
-        static_cast<long long>(FusedShrunk.DensitySamples)));
     return true;
 }
 

Source/VoxelForge/Private/Tests/VoxelForgeWorldEdgeSealTest.cpp

@@ -67,26 +67,20 @@ bool FVoxelForgeWorldEdgeSealTest::RunTest(const FString& Parameters)
         FailureKinds += Kind;
     };
 
-    // The ordinary fixture deliberately uses the requested default, so existing op-stack and
+    // The ordinary fixture deliberately uses the requested default, so the other tests exercise
-    // legacy tests exercise the setting without having to know about the new post.
+    // the setting without having to know about the new post.
-    FTestWorld Legacy;
+    FTestWorld Bounded;
-    Legacy.Build(/*Seed*/1337, /*GapChunks*/2, /*bUseOperatorStack*/false);
+    Bounded.Build(/*Seed*/1337, /*GapChunks*/2);
-    FTestWorld StackWorld;
-    StackWorld.Build(/*Seed*/1337, /*GapChunks*/2, /*bUseOperatorStack*/true);
     FTestWorld Unbounded;
-    Unbounded.Build(/*Seed*/1337, /*GapChunks*/2, /*bUseOperatorStack*/false);
+    Unbounded.Build(/*Seed*/1337, /*GapChunks*/2);
 
-    if (!Legacy.IsValid() || !StackWorld.IsValid() || !Unbounded.IsValid())
+    if (!Bounded.IsValid() || !Unbounded.IsValid())
     {
-        AddError(Legacy.IsValid() && StackWorld.IsValid() && Unbounded.IsValid()
+        AddError(!Bounded.IsValid() ? Bounded.WhyInvalid() : Unbounded.WhyInvalid());
-            ? TEXT("Unexpected edge-seal fixture state")
-            : (!Legacy.IsValid() ? Legacy.WhyInvalid()
-               : (!StackWorld.IsValid() ? StackWorld.WhyInvalid() : Unbounded.WhyInvalid())));
         return false;
     }
 
-    SetEdgeSettings(Legacy, TestWorldRadius);
+    SetEdgeSettings(Bounded, TestWorldRadius);
-    SetEdgeSettings(StackWorld, TestWorldRadius);
     SetEdgeSettings(Unbounded, 0.0f);
 
     //==========================================================================
@@ -103,12 +97,12 @@ bool FVoxelForgeWorldEdgeSealTest::RunTest(const FString& Parameters)
     for (int32 Slot = 0; Slot < 8; ++Slot)
     {
         int32 TopZ = 0, BottomZ = 0;
-        if (Legacy.GetSlotVoxelZRange(Slot, TopZ, BottomZ))
+        if (Bounded.GetSlotVoxelZRange(Slot, TopZ, BottomZ))
         {
             StrateZ.Add((float)((TopZ + BottomZ) / 2));
         }
     }
-    StrateZ.Add(Legacy.MidVoxelZ());
+    StrateZ.Add(Bounded.MidVoxelZ());
 
     int32 NumPositiveSamples = 0;
     for (const FVector& XY : FarXY)
@@ -117,8 +111,7 @@ bool FVoxelForgeWorldEdgeSealTest::RunTest(const FString& Parameters)
         {
             const FVector P(XY.X, XY.Y, Z);
             ++NumPositiveSamples;
-            if (!IsSolidMC(*Legacy.Generator, P)) Fail(TEXT("positive-legacy"));
+            if (!IsSolidMC(*Bounded.Generator, P)) Fail(TEXT("positive"));
-            if (!IsSolidMC(*StackWorld.Generator, P)) Fail(TEXT("positive-opstack"));
         }
     }
 
@@ -138,7 +131,7 @@ bool FVoxelForgeWorldEdgeSealTest::RunTest(const FString& Parameters)
         for (const float Z : StrateZ)
         {
             const FVector P(XY.X, XY.Y, Z);
-            const float BoundedD = Legacy.Generator->GetDensityAt(P.X, P.Y, P.Z);
+            const float BoundedD = Bounded.Generator->GetDensityAt(P.X, P.Y, P.Z);
             const float UnboundedD = Unbounded.Generator->GetDensityAt(P.X, P.Y, P.Z);
             ++NumInteriorComparisons;
             if (!BitEqual(BoundedD, UnboundedD)) Fail(TEXT("interior-not-no-op"));
@@ -193,7 +186,7 @@ bool FVoxelForgeWorldEdgeSealTest::RunTest(const FString& Parameters)
     // CLASSIFYBOX — force boxes in the ramp and beyond the radius, then brute-force every voxel.
     //==========================================================================
     int32 TopShaftZ = 0, BottomShaftZ = 0;
-    if (!StackWorld.GetSlotVoxelZRange(FTestWorld::SlotVerticalShafts, TopShaftZ, BottomShaftZ))
+    if (!Bounded.GetSlotVoxelZRange(FTestWorld::SlotVerticalShafts, TopShaftZ, BottomShaftZ))
     {
         Fail(TEXT("missing-shaft-slot"));
     }
@@ -218,17 +211,17 @@ bool FVoxelForgeWorldEdgeSealTest::RunTest(const FString& Parameters)
         };
 
         const int32 MidChunkZ = FMath::FloorToInt((BoxZ0 + BoxZ1) * 0.5f / CHUNK_SIZE);
-        const FVerticalShaftParams ShaftParams = StackWorld.StrateManager->GetVerticalShaftParamsForChunk(
+        const FVerticalShaftParams ShaftParams = Bounded.StrateManager->GetVerticalShaftParamsForChunk(
             FIntVector(0, 0, MidChunkZ));
         FVoxelOpStack Stack;
         VoxelDensityOps::BuildVerticalShaftStack(
-            Stack, ShaftParams, StackWorld.Settings->Seed,
+            Stack, ShaftParams, Bounded.Settings->Seed,
-            StackWorld.Generator->OriginSpineRadius, StackWorld.StrateManager.Get());
+            Bounded.Generator->OriginSpineRadius, Bounded.StrateManager.Get());
 
         FVoxelOpContext Ctx;
         Ctx.ChunkCoord = FIntVector(0, 0, MidChunkZ);
-        Ctx.Seed = (uint32)StackWorld.Settings->Seed;
+        Ctx.Seed = (uint32)Bounded.Settings->Seed;
-        Ctx.LayoutVersion = StackWorld.StrateManager->GetLayoutVersion();
+        Ctx.LayoutVersion = Bounded.StrateManager->GetLayoutVersion();
         Ctx.StrateTopWorldZ = ShaftParams.StrateTopWorldZ;
         Ctx.StrateBottomWorldZ = ShaftParams.StrateBottomWorldZ;
         Ctx.WorldRadiusVoxels = TestWorldRadius;
@@ -255,14 +248,14 @@ bool FVoxelForgeWorldEdgeSealTest::RunTest(const FString& Parameters)
             for (int32 X = X0; X <= X1; ++X)
             {
                 ++NumVoxelsChecked;
-                if (!IsSolidMC(*StackWorld.Generator, FVector((float)X, (float)Y, (float)Z)))
+                if (!IsSolidMC(*Bounded.Generator, FVector((float)X, (float)Y, (float)Z)))
                     Fail(TEXT("classifybox-false-allsolid"));
             }
         }
     }
 
     // The T1.d path must be able to skip an edge tile without knowing which Z category it hits.
-    const EVoxelTileClass EdgeTile = StackWorld.Generator->ClassifyTile(
+    const EVoxelTileClass EdgeTile = Bounded.Generator->ClassifyTile(
         FIntVector(320, 0, BottomShaftZ + 8), 1, 8);
     int32 NumTilesProved = (EdgeTile == EVoxelTileClass::AllSolid) ? 1 : 0;
     if (EdgeTile != EVoxelTileClass::AllSolid) Fail(TEXT("classifytile-missed-edge"));
@@ -283,9 +276,7 @@ bool FVoxelForgeWorldEdgeSealTest::RunTest(const FString& Parameters)
     // coverage only: the synthetic helper case above is the hard assertion even if landing-site
     // adjustment moves every generated mouth out of this small test rim.
     FTestWorld GeneratedPassageWorld;
-    GeneratedPassageWorld.Build(/*Seed*/1337, /*GapChunks*/2, /*bUseOperatorStack*/false);
+    GeneratedPassageWorld.Build(/*Seed*/1337, /*GapChunks*/2);
-    FTestWorld GeneratedPassageStackWorld;
-    GeneratedPassageStackWorld.Build(/*Seed*/1337, /*GapChunks*/2, /*bUseOperatorStack*/true);
     auto CheckGeneratedPassages = [&](FTestWorld& World, const TCHAR* FailureKind)
     {
         if (!World.IsValid())
@@ -310,7 +301,6 @@ bool FVoxelForgeWorldEdgeSealTest::RunTest(const FString& Parameters)
         }
     };
     CheckGeneratedPassages(GeneratedPassageWorld, TEXT("generated-passage-breaches-rim"));
-    CheckGeneratedPassages(GeneratedPassageStackWorld, TEXT("generated-opstack-passage-breaches-rim"));
 
     // One sorted summary block; individual samples intentionally never log.
     AddInfo(FString::Printf(
@@ -319,7 +309,7 @@ bool FVoxelForgeWorldEdgeSealTest::RunTest(const FString& Parameters)
         TEXT("  classify_tile_proved=%d\n")
         TEXT("  interior_comparisons=%d\n")
         TEXT("  near_rim_passage_checks=%d\n")
-        TEXT("  positive_sample_points=%d (checked in both paths)\n")
+        TEXT("  positive_sample_points=%d\n")
         TEXT("  rim_directions=%d\n")
         TEXT("  rim_max_adjacent_solidness_jump=%.6f (threshold=%.6f)\n")
         TEXT("  voxels_checked=%lld\n")

Source/VoxelForge/Private/VoxelGenerator.cpp

@@ -16,7 +16,7 @@
 #include "VoxelWormField.h"
 #include "VoxelDensityAblation.h" // fingerprinted development-only stage measurements
 #include "VoxelDensityPrimitives.h"   // spine / seals / passage — shared with the operator stack
-#include "VoxelDensityOpStack.h"      // the opt-in per-strate operator stack
+#include "VoxelDensityOpStack.h"      // the per-strate operator stack
 #include "VoxelHeightOp.h"            // IVoxelBiomeField — the adapter below implements it
 #include "VoxelStats.h"
 #include "VoxelDensityProfile.h"
@@ -669,9 +669,9 @@ struct FVoxelDensityBlockSession
             return;
         }
 
-        // Allocate lazily on the first operator-stack sample.  Legacy archetypes still use the
+        // Allocate lazily on the first operator-stack sample.  Chunks that never reach a stack
-        // ordinary scalar generator and should not pay for a block scratch lattice merely because
+        // (gaps, out-of-layout, degenerate strates) use the ordinary scalar path and should not
-        // the mesher opened the scoped hand-off.
+        // pay for a block scratch lattice merely because the mesher opened the scoped hand-off.
         BlockScratch.Reset();
     }
 
@@ -2549,12 +2549,11 @@ namespace
     /**
      * Construit la pile de cet archétype dans `OutStack` et remplit les bornes Z de `OutCtx`.
      *
-     * @return false quand la pile NE DOIT PAS être utilisée — archétype non porté, params absents,
+     * @return false quand la pile NE DOIT PAS être utilisée — archétype inconnu, params absents,
-     *         ou **strate dégénérée**. Ce dernier cas n'est pas de la prudence : cinq fonctions
+     *         ou **strate dégénérée** (hauteur nulle). La pile n'a pas d'early-out pour ce dernier
-     *         d'archétype court-circuitent sur `return 1.0f` (= air) quand la hauteur est nulle,
+     *         cas, par conception : l'appelant rend de l'air (`GetDensityAt`) ou refuse de prouver
-     *         et la pile n'a pas cet early-out, par conception. L'appelant retombe sur le `switch`,
+     *         la tuile (`ClassifyTile`). (`GetDensityWithParams` n'a aucun early-out de ce genre :
-     *         qui EST le comportement de référence. (`GetDensityWithParams`, lui, n'a aucun
+     *         TunnelNetwork/Underwater n'ont donc pas cette garde.)
-     *         early-out de ce genre : TunnelNetwork/Underwater n'ont donc pas cette garde.)
      */
     bool VF_BuildOpStackForChunk(ECaveGeneratorType Type, FVoxelStackParamRefs& Refs,
                                  int32 Seed, float SpineRadius, const UVoxelStrateManager* SM,
@@ -2572,8 +2571,8 @@ namespace
 
         case ECaveGeneratorType::FlatPlain:
         case ECaveGeneratorType::CrystalChamber:
-            // UN SEUL cas pour les deux, comme le `switch` de production : `GetSlabDensity` ne les
+            // UN SEUL cas pour les deux : ils ne diffèrent que par leurs valeurs par défaut.
-            // distingue pas non plus. Voir BuildSlabStack.
+            // Voir BuildSlabStack.
             if (!Refs.Slab) { return false; }
             if (Refs.Slab->StrateTopWorldZ - Refs.Slab->StrateBottomWorldZ <= 0.0f) { return false; }
             OutCtx.StrateTopWorldZ    = Refs.Slab->StrateTopWorldZ;
@@ -2621,9 +2620,8 @@ namespace
             return true;
 
         default:
-            // `UsesOperatorStackForChunk` ne rend true que pour les archétypes portés (les 8), donc
+            // `UsesOperatorStackForChunk` ne rend true que pour les 8 archétypes, donc on ne devrait
-            // on ne devrait jamais arriver ici. Si ça arrive : retomber sur le `switch` plutôt que
+            // jamais arriver ici (valeur d'enum invalide).
-            // générer du vide — un monde faux est pire qu'un monde non porté.
             return false;
         }
     }
@@ -2842,11 +2840,6 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
         thread_local FBiomeContext            CP_BiomeCtx;
         thread_local FChunkBiomeCache         CP_BiomeCache;
         thread_local TArray<FSurfaceGenerationParams> CP_SurfaceBiomeParams;
-        // T1.a per-column surface cache: GSurfColCache (file-scope, shared with ClassifyTile).
-        // Discriminates the surface cache by strate: same strate ⇒ identical heightfield params ⇒ columns
-        // are shareable across the whole vertical chunk stack. Taken from the params themselves
-        // (StrateBottomWorldZ is unique per stacked strate) so the key can never disagree with CP_Surface.
-        thread_local int32                    CP_StrateKey = MIN_int32;
         // AUDIT C2 — la clé DOIT contenir la version de layout, pas seulement le chunk. Après un
         // RebuildStrates / une édition à chaud, StrateManager reconstruit le layout et bumpe la
         // version ; un worker dont CP_Chunk vaut encore ce chunk sauterait le refetch et
@@ -2860,8 +2853,8 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
         // when the other context misses, this bit must force the rebuild guard below to run.
         thread_local bool                      CP_UsesTileCacheWindow = false;
         // OPSTACK — la pile d'opérateurs, construite dans le MÊME bloc de refetch que les
-        // params (donc même clé owner+chunk+version, aucune logique d'invalidation en plus). Vide tant que
+        // params (donc même clé owner+chunk+version, aucune logique d'invalidation en plus). Vide
-        // la strate n'a pas coché `bUseOperatorStack` ET que son archétype n'est pas porté.
+        // seulement pour une strate dégénérée (hauteur nulle).
         thread_local FVoxelOpStack            CP_OpStack;
         thread_local bool                     CP_UseOpStack = false;
         thread_local uint64                    CP_ManagerLifetimeId = 0;
@@ -2890,8 +2883,8 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
         // A coarse tile samples thousands of exact XY chunk keys, but those keys describe the
         // same immutable stack whenever the selected archetype is operator-stack backed.  Share
         // that prepared state by Z; the stack still queries the actual world position, and its
-        // room-graph cache remains keyed by the real XY search window.  Legacy tunnel states keep
+        // room-graph cache remains keyed by the real XY search window.  Chunks outside the strate
-        // the full XYZ key because their native cache is built for one XY window.
+        // layout (constant air) keep the full XYZ key.
         const ECaveGeneratorType QueryGeneratorType = bUseChunkRoutingCache
             ? CP_RouteGeneratorType
             : StrateManager->GetGeneratorTypeForChunk(ChunkCoord);
@@ -3066,7 +3059,6 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
                 CP_Maze    = StrateManager->GetMazeParamsForChunk(ChunkCoord);            break;
             case ECaveGeneratorType::SurfaceWorld:
                 ResolveSurfaceChunkParams(ChunkCoord, CP_Surface, CP_BiomeCtx, CP_SurfaceBiomeParams);
-                CP_StrateKey = FMath::RoundToInt(CP_Surface.StrateBottomWorldZ);
                 break;
             case ECaveGeneratorType::VerticalShafts:
                 CP_Vert    = StrateManager->GetVerticalShaftParamsForChunk(ChunkCoord);   break;
@@ -3085,28 +3077,17 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
             }
             CP_Dist = StrateManager->GetDisturbanceParamsForChunk(ChunkCoord);
 
-            // ── OPSTACK : (re)construire la pile si cette strate l'a demandée. ──
+            // ── OPSTACK : (re)construire la pile de ce chunk. ──
-            // Une seule branche ajoutée au chemin densité, et elle est FROIDE : la construction est
+            // Toute strate est générée par une pile d'opérateurs. La construction est par chunk
-            // par chunk (comme le refetch de params juste au-dessus), jamais par voxel.
+            // (comme le refetch de params juste au-dessus), jamais par voxel.
-            CP_UseOpStack = bUseChunkRoutingCache
+            // Every strate is generated by an operator stack. An editor composer candidate or a
-                ? CP_RouteUsesOperatorStack
+            // cooked-season recipe supplies its own stack; otherwise — or if that stack cannot be
-                : StrateManager->UsesOperatorStackForChunk(ChunkCoord);
+            // built — the archetype's native stack is used.
-            CP_UseOpStack = CP_UseOpStack || CP_UseCustomRecipe;
-#if WITH_EDITOR
-            // A composer override is already an explicit, validated stack description.  It must
-            // be evaluated even when the authored definition had the normal operator-stack opt-in
-            // disabled; otherwise a multi-region candidate would be installed in the manager but
-            // silently fall back to the old one-archetype switch.
-            CP_UseOpStack = CP_UseOpStack || CP_UseComposerRegions;
-#endif
-            if (CP_UseOpStack)
-            {
             CP_OpStack = FVoxelOpStack();   // move-assign : libère l'ancienne pile
-                bool bBuiltSpecialStack = false;
+            CP_UseOpStack = false;
 #if WITH_EDITOR
             if (CP_UseComposerRegions)
             {
-                    bBuiltSpecialStack = true;
                 FVoxelOpContext RegionContext;
                 if (VF_BuildStrateRegionStack(
                     CP_ComposerRegions, OriginSpineRadius, StrateManager,
@@ -3118,16 +3099,16 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
                     RegionContext.WorldRadiusVoxels = WorldRadiusVoxels;
                     RegionContext.EdgeSealThickness = EdgeSealThickness;
                     CP_OpStack.PrepareChunk(RegionContext);
+                    CP_UseOpStack = true;
                 }
                 else
                 {
-                        CP_UseOpStack = false;
+                    CP_OpStack = FVoxelOpStack();
+                    CP_UseComposerRegions = false;
                 }
             }
 #endif
-                if (!bBuiltSpecialStack)
+            if (!CP_UseOpStack && CP_UseCustomRecipe)
-                {
-                    if (CP_UseCustomRecipe)
             {
                 FVoxelOpContext RecipeContext;
                 if (VF_BuildStackFromRecipe(
@@ -3142,15 +3123,17 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
                     RecipeContext.WorldRadiusVoxels = WorldRadiusVoxels;
                     RecipeContext.EdgeSealThickness = EdgeSealThickness;
                     CP_OpStack.PrepareChunk(RecipeContext);
+                    CP_UseOpStack = true;
                 }
                 else
                 {
-                            // Import/load validates recipes before a season becomes active. Keep
+                    // Import/load validates recipes before a season becomes active. If a future
-                            // the fallback hole-safe if a future schema changes underneath it.
+                    // schema still fails here, fall back to the archetype's native stack below.
-                            CP_UseOpStack = false;
+                    CP_OpStack = FVoxelOpStack();
+                    CP_UseCustomRecipe = false;
                 }
             }
-                    else
+            if (!CP_UseOpStack)
             {
                 FVoxelOpContext OpCtx;
                 OpCtx.ChunkCoord    = ChunkCoord;
@@ -3190,26 +3173,16 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
                     CP_GenType, Refs, Seed, OriginSpineRadius,
                     StrateManager, CP_OpStack, OpCtx);
 
-                // Le test appelle PrepareChunk, pas la production : c'est exactement la divergence
+                // PrepareChunk runs here exactly as in the tests, so an op that hoists real
-                // qui rend un opérateur vert en test et faux en jeu. Les sept `PrepareChunk`
+                // per-chunk work behaves the same in game. `Step` reste 1 : GetDensityAt ne connaît
-                // actuels sont vides, donc ceci ne change RIEN aujourd'hui — c'est le point : le
+                // pas le pas d'échantillonnage du mesher (voir le contrat T2.b dans VoxelDensityOp.h).
-                // premier opérateur qui hisse vraiment du travail par chunk doit trouver l'appel
-                // déjà là. `Step` reste 1 : GetDensityAt ne connaît pas le pas d'échantillonnage
-                // du mesher (voir le contrat T2.b dans VoxelDensityOp.h).
-                // The test calls PrepareChunk and production did not — the exact divergence that
-                // makes an op green in test and wrong in game. All seven bodies are empty today,
-                // which is the point: the first op that hoists real per-chunk work must find the
-                // call already here.
                 if (CP_UseOpStack) { CP_OpStack.PrepareChunk(OpCtx); }
             }
-                }
-            }
 
-            // The legacy path needs its prepared native tunnel-core cache.  An operator-stack
+            // An operator-stack tunnel source publishes the world-space core after EvalMC, so
-            // tunnel source publishes the same world-space result after EvalMC, so preparing a
+            // preparing a second full graph/core cache here would only duplicate the work that made
-            // second full graph/core cache here would only duplicate the work that made coarse
+            // coarse streaming expensive in the first place. Only an editor composer region stack,
-            // streaming expensive in the first place.  Custom/composer paths retain the legacy
+            // which does not publish that hand-off, still gets the prepared native core.
-            // cache unless their own stack supplies the hand-off.
             const bool bNativeTunnelCore = !CP_UseCustomRecipe
                 && (CP_GenType == ECaveGeneratorType::TunnelNetwork
                     || CP_GenType == ECaveGeneratorType::Underwater);
@@ -3294,12 +3267,9 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
         FTunnelCoreWorldEvaluation FusedTunnelCore;
         bool bRoomOwnsBottom = false;
         bool bRoomOwnsBottomValid = false;
-        FVector NativeWarpedPosition = FVector::ZeroVector;
-        bool bNativeWarpedPositionValid = false;
 
         // Le seul point d'entrée de la pile dans le chemin de production. Elle rend la convention
-        // MC (négatif = solide) comme les fonctions d'archétype, donc les disturbances et la couche
+        // MC (négatif = solide), que les disturbances et la couche de diff qui suivent attendent.
-        // de diff qui suivent ne voient aucune différence.
         if (CP_UseOpStack)
         {
             const bool bCanUseFusedEvaluator =
@@ -3383,66 +3353,11 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
                 }
             }
         }
-        else switch (CP_GenType)
-        {
-        case ECaveGeneratorType::FlatPlain:
-        case ECaveGeneratorType::CrystalChamber:
-            Result = GetSlabDensity(WorldX, WorldY, WorldZ, CP_Slab);                 break;
-        case ECaveGeneratorType::Maze:
-            Result = GetMazeDensity(WorldX, WorldY, WorldZ, CP_Maze);                 break;
-        case ECaveGeneratorType::SurfaceWorld:
-        {
-            // Integer XY (the density grid) → reuse the column down its whole Z extent (T1.a).
-            // Fractional XY (gradient-normal samples) → compute directly (no cache key).
-            if (WorldX == FMath::FloorToFloat(WorldX) && WorldY == FMath::FloorToFloat(WorldY))
-            {
-                const int32 IX = (int32)WorldX, IY = (int32)WorldY;
-                // XY-keyed LRU box (shared down the whole vertical strate stack). Acquire centres a box on
-                // the first sample so the rest of the chunk's queries — incl. the ±Step margin ring — hit.
-                FSurfaceColumnBox& Box = GSurfColCache.Acquire(
-                    IX, IY, CP_StrateKey, Seed, LayoutVersion,
-                    DensityCacheOwnerId, ManagerLifetimeId);
-                const int32 CI = (IY - Box.BaseY) * FSurfaceColumnBox::Dim + (IX - Box.BaseX);
-                if (!Box.Computed[CI])
-                {
-                    ComputeSurfaceColumn(WorldX, WorldY, ChunkCoord.Z, CP_Surface, CP_BiomeCtx,
-                        CP_SurfaceBiomeParams, CP_BiomeCache,
-                        Box.Cols[CI].TerrainZ, Box.Cols[CI].CeilSurf,
-                        Box.Cols[CI].OverhangAmp, Box.Cols[CI].DirX, Box.Cols[CI].DirY);
-                    Box.Computed[CI] = true;
-                }
-                const FSurfaceColumn& Col = Box.Cols[CI];
-                Result = SurfaceDensityFromColumn(WorldX, WorldY, WorldZ,
-                    Col.TerrainZ, Col.CeilSurf, Col.OverhangAmp,
-                    Col.DirX, Col.DirY, CP_Surface);
-            }
         else
         {
-                float TerrainZ, CeilSurf, OverhangAmp, DirX, DirY;
+            // Only a degenerate strate (zero height) has no stack. It is open air, like the
-                ComputeSurfaceColumn(WorldX, WorldY, ChunkCoord.Z, CP_Surface, CP_BiomeCtx,
+            // archetype functions the stack replaced.
-                    CP_SurfaceBiomeParams, CP_BiomeCache, TerrainZ, CeilSurf,
+            Result = 1.0f;
-                    OverhangAmp, DirX, DirY);
-                Result = SurfaceDensityFromColumn(WorldX, WorldY, WorldZ,
-                    TerrainZ, CeilSurf, OverhangAmp, DirX, DirY, CP_Surface);
-            }
-            break;
-        }
-        case ECaveGeneratorType::VerticalShafts:
-            Result = GetVerticalShaftDensity(WorldX, WorldY, WorldZ, CP_Vert);        break;
-        case ECaveGeneratorType::FloatingIslands:
-            Result = GetFloatingIslandDensity(WorldX, WorldY, WorldZ, CP_Float);      break;
-        case ECaveGeneratorType::Underwater:
-        case ECaveGeneratorType::TunnelNetwork:
-        default:
-            // Underwater shares tunnel rock (water table is a render-side overlay).
-        Result = GetDensityWithParams(WorldX, WorldY, WorldZ, CP_Tunnel,
-                                          CP_TunnelFP, LayoutVersion,
-                                          /*bApplyLegacyStructuralPosts=*/false,
-                                          nullptr, false, &bRoomOwnsBottom,
-                                          &NativeWarpedPosition);
-            bRoomOwnsBottomValid = true;
-            bNativeWarpedPositionValid = true;
-            break;
         }
         DensityCoreTimer.End();
 
@@ -3482,21 +3397,13 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
         {
             VoxelDensityProfile::FScopedTimer ProfileTimer(
                 VoxelDensityProfile::EBucket::TunnelCorePosts);
-            FVector RoomQueryPosition;
+            FVector RoomQueryPosition(WorldX, WorldY, WorldZ);
-            if (bNativeWarpedPositionValid)
-            {
-                RoomQueryPosition = NativeWarpedPosition;
-            }
-            else
-            {
-                RoomQueryPosition = FVector(WorldX, WorldY, WorldZ);
             if (CP_Tunnel.VerticalScale != 1.0f && CP_Tunnel.VerticalScale > 0.0f)
             {
                 RoomQueryPosition.Z = WorldZ / CP_Tunnel.VerticalScale;
             }
             RoomQueryPosition = VoxelCaveMorphology::ApplyCaveWarp(
                 RoomQueryPosition, CP_Tunnel, static_cast<uint32>(Seed));
-            }
             PreDisturbanceTunnelCore = VoxelCaveMorphology::EvaluateTunnelCoreWorld(
                 WorldX, WorldY, WorldZ, ActiveTunnelCoreCache->Cache, nullptr,
                 VoxelGenLOD::ShouldUseSpatialIndex(
@@ -3520,7 +3427,7 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
         // A disturbance is allowed to add visual detail, but it must not refill the landing's
         // measured air volume or turn its support slab back into a hole. Reassert the landing
         // air first, then the structural floor, in MC space before the final XY seal. The two
-        // calls use the same landing geometry already evaluated by the legacy and op-stack post.
+        // calls use the same landing geometry already evaluated by the op-stack structural post.
         VoxelDensityProfile::FScopedTimer DensityStructuralPostsTimer(
             VoxelDensityProfile::EBucket::DensityStructuralPosts);
         VoxelDensityProfile::FScopedTimer StructuralTailTimer(
@@ -3695,21 +3602,13 @@ float UVoxelGenerator::GetDensityAt(float WorldX, float WorldY, float WorldZ) co
             {
                 VoxelDensityProfile::FScopedTimer ProfileTimer(
                     VoxelDensityProfile::EBucket::TunnelCorePosts);
-                FVector RoomQueryPosition;
+                FVector RoomQueryPosition(WorldX, WorldY, WorldZ);
-                if (bNativeWarpedPositionValid)
-                {
-                    RoomQueryPosition = NativeWarpedPosition;
-                }
-                else
-                {
-                    RoomQueryPosition = FVector(WorldX, WorldY, WorldZ);
                 if (CP_Tunnel.VerticalScale != 1.0f && CP_Tunnel.VerticalScale > 0.0f)
                 {
                     RoomQueryPosition.Z = WorldZ / CP_Tunnel.VerticalScale;
                 }
                 RoomQueryPosition = VoxelCaveMorphology::ApplyCaveWarp(
                     RoomQueryPosition, CP_Tunnel, static_cast<uint32>(Seed));
-                }
                 TunnelCore = VoxelCaveMorphology::EvaluateTunnelCoreWorld(
                     WorldX, WorldY, WorldZ, ActiveTunnelCoreCache->Cache,
                     nullptr,
@@ -6823,7 +6722,7 @@ EVoxelTileClass UVoxelGenerator::ClassifyTileUncached(
     bool bCanSolid = true;   // "tout le treillis est solide" encore prouvable
     bool bCanAir   = true;   // "tout le treillis est air" encore prouvable
     // ── Catégorisation par Z du treillis : gap bedrock = solide ; hors layout = air constant ;
-    //    SurfaceWorld = test colonne ; un slot cave opt-in = verdict de pile sur sa sous-boîte. ──
+    //    SurfaceWorld = test colonne ; un slot cave = verdict de pile sur sa sous-boîte. ──
     struct FSurfSlot
     {
         int32 BotChunkZ = INT32_MAX;   // identité du slot (borne basse de la strate, en chunks)
@@ -6904,7 +6803,7 @@ EVoxelTileClass UVoxelGenerator::ClassifyTileUncached(
             // EST FAUX) et `IsGapChunk` rend false au-dessus du sommet (« open air, NOT a gap »).
             // Résultat : chaque tuile touchant l'air libre au-dessus du monde entrait dans la
             // BRANCHE DE CAVE, n'y trouvait aucun slot, et abandonnait — mesuré en jeu à 83 % des
-            // tuiles classées (`Cave Bail Not Op Stack No Layout` = 1.58 / 1.90).
+            // tuiles classées.
             //
             // La vérité est dans `GetGenerationParams` : hors layout il rend `BaseDensity = -1`,
             // `RoomDensity = 0`, `WormStrength = 0` — un champ CONSTANT, donc de l'air, sans salle
@@ -6987,38 +6886,11 @@ EVoxelTileClass UVoxelGenerator::ClassifyTileUncached(
                 // le pliage générique de la pile — mais SEULEMENT sous des conditions vérifiables,
                 // parce qu'un faux verdict ici est un trou (pas de géométrie, pas de collision).
                 //
-                // Condition 1 : la strate doit RÉELLEMENT être générée par la pile. Sinon on
+                // Condition 1 : le slot doit avoir une pile (une définition d'archétype connue).
-                // classerait un champ que le mesher ne produira pas. C'est le même drapeau, lu au
+                // Sinon on classerait un champ que le mesher ne produira pas.
-                // même endroit, que `GetDensityAt`.
                 if (!StrateManager->UsesOperatorStackForChunk(CC))
                 {
-                    // Attribution DIAGNOSTIQUE uniquement : distingue une strate cave entièrement
+                    INC_DWORD_STAT(STAT_VoxelForgeCaveBailNoStack);
-                    // désactivée d'une tuile de frontière qui a rencontré un slot désactivé avant
-                    // la garde « slot différent » ci-dessous.
-                    // On résout les bornes APRÈS l'échec du même prédicat ; elles ne changent ni
-                    // la condition, ni le point de retour, ni le verdict.
-                    // Diagnostic attribution only: separates a wholly disabled cave slot from a
-                    // boundary tile that met a disabled slot before the different-slot guard
-                    // below. Resolve bounds only after the same predicate fails; classification
-                    // control flow and return value stay unchanged.
-                    int32 FailedTopCZ = 0, FailedBotCZ = 0;
-                    if (!StrateManager->GetStrateChunkZBounds(ChunkZ, FailedTopCZ, FailedBotCZ))
-                    {
-                        INC_DWORD_STAT(STAT_VoxelForgeCaveBailNotOpStackNoLayout);
-                    }
-                    else
-                    {
-                        const int32 TileMinCZ = FloorDivC(MinZ, CHUNK_SIZE);
-                        const int32 TileMaxCZ = FloorDivC(MaxZ, CHUNK_SIZE);
-                        if (TileMinCZ >= FailedBotCZ && TileMaxCZ <= FailedTopCZ)
-                        {
-                            INC_DWORD_STAT(STAT_VoxelForgeCaveBailNotOpStackSoleSlot);
-                        }
-                        else
-                        {
-                            INC_DWORD_STAT(STAT_VoxelForgeCaveBailNotOpStackBoundaryTile);
-                        }
-                    }
                     return EVoxelTileClass::Mixed;
                 }
 
@@ -7223,16 +7095,11 @@ EVoxelTileClass UVoxelGenerator::ClassifyTileUncached(
                 return EVoxelTileClass::Mixed;   // la boîte déborde sur un autre archétype
             }
 
-            // Le drapeau doit tenir sur TOUS les chunks de la boîte, pas seulement sur celui qui a
+            // Every chunk of the box must have a stack, not only the one that triggered the
-            // déclenché la tentative : un seul chunk hors pile invaliderait le verdict.
+            // attempt (redundant with the Z pass today, kept hole-safe).
             if (!StrateManager->UsesOperatorStackForChunk(CC))
             {
-                // Le passage Z précédent a déjà accepté l'unique slot cave. Avec le layout actuel
+                INC_DWORD_STAT(STAT_VoxelForgeCaveBailNoStack);
-                // (prédicat indépendant de X/Y), ce recheck est redondant ; un hit nomme donc
-                // précisément cette garde tardive au lieu d'être agrégé aux opt-ins désactivés.
-                // The prior Z pass already accepted the sole cave slot. With the current X/Y-
-                // independent predicate this recheck is redundant, so attribute it separately.
-                INC_DWORD_STAT(STAT_VoxelForgeCaveBailNotOpStackRecheck);
                 return EVoxelTileClass::Mixed;
             }
 
@@ -7331,8 +7198,8 @@ EVoxelTileClass UVoxelGenerator::ClassifyTileUncached(
         if (!VF_BuildOpStackForChunk(CaveType, Refs, Seed, OriginSpineRadius,
                                      StrateManager, TileStack, OpCtx))
         {
-            // Strate dégénérée ou archétype non porté : `GetDensityAt` retomberait sur le `switch`,
+            // Strate dégénérée : `GetDensityAt` y rend de l'air sans pile, donc la pile ne décrit
-            // donc la pile ne décrit pas ce que le mesher verra. Aucun verdict.
+            // pas ce que le mesher verra. Aucun verdict.
             INC_DWORD_STAT(STAT_VoxelForgeCaveBailNoStack);
             return EVoxelTileClass::Mixed;
         }

Source/VoxelForge/Private/VoxelStats.cpp

@@ -10,10 +10,6 @@ DEFINE_STAT(STAT_VoxelForgeTilesSkippedAllAir);
 DEFINE_STAT(STAT_VoxelForgeTilesMeshed);
 DEFINE_STAT(STAT_VoxelForgeTilesOpStackSolid);
 DEFINE_STAT(STAT_VoxelForgeTilesOpStackAir);
-DEFINE_STAT(STAT_VoxelForgeCaveBailNotOpStackSoleSlot);
-DEFINE_STAT(STAT_VoxelForgeCaveBailNotOpStackBoundaryTile);
-DEFINE_STAT(STAT_VoxelForgeCaveBailNotOpStackNoLayout);
-DEFINE_STAT(STAT_VoxelForgeCaveBailNotOpStackRecheck);
 DEFINE_STAT(STAT_VoxelForgeCaveMixOutOfLayout);
 DEFINE_STAT(STAT_VoxelForgeCaveMixGap);
 DEFINE_STAT(STAT_VoxelForgeCaveMixSurfaceWorld);

Source/VoxelForge/Private/VoxelStrateManager.cpp

@@ -2,7 +2,6 @@
 // Runtime strate layout generation and queries.
 
 #include "VoxelStrateManager.h"
-#include "CoreGlobals.h"  // GIsAutomationTesting — the opt-in diagnostic stays quiet under tests
 #include "VoxelSettings.h"
 #include "VoxelSeasonAsset.h"
 #include "VoxelTypes.h"  // For CHUNK_SIZE, VOXEL_SIZE, WorldToChunkCoord
@@ -1334,7 +1333,6 @@ bool UVoxelStrateManager::Initialize(UVoxelSettings* Settings, int32 WorldSeed)
             }
 
             Slot.Definition->GeneratorType = SeasonStrate.Archetype;
-            Slot.Definition->bUseOperatorStack = SeasonStrate.bUsesRecipe;
             Slot.Definition->StrateHeightInChunks = SeasonStrate.HeightInChunks;
             Slot.Definition->GenerationParams = SeasonStrate.Params.TunnelNetworkParams;
             Slot.Definition->SlabParams = SeasonStrate.Params.SlabParams;
@@ -1401,10 +1399,9 @@ bool UVoxelStrateManager::Initialize(UVoxelSettings* Settings, int32 WorldSeed)
                 : FString::Printf(TEXT("Value_%d"), static_cast<int32>(Slot.Definition->GeneratorType));
             VoxelForgeStartupTrace::RecordEvent(TEXT("strate_slot"), FString::Printf(
                 TEXT("\"index\":%d,\"definition\":\"%s\",\"archetype\":\"%s\",\"top_chunk_z\":%d,"
-                     "\"bottom_chunk_z\":%d,\"height_chunks\":%d,\"operator_stack\":%d"),
+                     "\"bottom_chunk_z\":%d,\"height_chunks\":%d"),
                 Slot.StrateIndex, *DefinitionPath, *ArchetypeName,
-                Slot.TopChunkZ, Slot.BottomChunkZ, Slot.HeightInChunks,
+                Slot.TopChunkZ, Slot.BottomChunkZ, Slot.HeightInChunks));
-                Slot.Definition->bUseOperatorStack ? 1 : 0));
         }
 
         UE_LOG(LogTemp, Log, TEXT("[StrateManager] Strate %d: '%s' | Z chunks [%d to %d] | %d chunks tall"),
@@ -1415,79 +1412,6 @@ bool UVoxelStrateManager::Initialize(UVoxelSettings* Settings, int32 WorldSeed)
             Slot.HeightInChunks);
     }
 
-    // Diagnostic de configuration, une seule fois par construction de layout. SurfaceWorld est
-    // volontairement exclu : son chemin T1.d exact-lattice ne dépend pas de ce drapeau.
-    // Configuration diagnostic once per layout build. SurfaceWorld is deliberately excluded:
-    // its exact-lattice T1.d path does not depend on this flag.
-    int32 NumCaveSlots = 0;
-    int32 NumOperatorStackDisabledCaves = 0;
-    for (const FStrateSlot& Slot : StrateLayout)
-    {
-        const ECaveGeneratorType SlotArchetype = bUseSeason
-            ? SeasonStrates[Slot.StrateIndex].Archetype : Slot.Definition->GeneratorType;
-        if (!Slot.Definition || SlotArchetype == ECaveGeneratorType::SurfaceWorld)
-        {
-            continue;
-        }
-
-        ++NumCaveSlots;
-        const bool bUsesStack = bUseSeason
-            ? SeasonStrates[Slot.StrateIndex].bUsesRecipe : Slot.Definition->bUseOperatorStack;
-        if (!bUsesStack)
-        {
-            ++NumOperatorStackDisabledCaves;
-        }
-    }
-
-    // ⚠️ WARNING EN ÉDITEUR/JEU, JAMAIS EN TEST. Les tests `Determinism.*` construisent
-    // DÉLIBÉRÉMENT un monde non opt-in — c'est leur oracle de comparaison — et le framework
-    // d'automatisation compte un Warning comme un échec. Un diagnostic ne doit pas casser la suite
-    // qu'il est censé éclairer. Le message reste écrit UNE fois : seule la verbosité change.
-    // Warning in editor/game where it is actionable, never in tests: the Determinism.* tests build
-    // a non-opted-in world ON PURPOSE as their comparison oracle, and the automation framework
-    // treats a Warning as a failure. One message, two verbosities.
-    const bool bQuietDiagnostic = GIsAutomationTesting;
-
-    if (NumOperatorStackDisabledCaves > 0)
-    {
-        const FString Summary = FString::Printf(
-            TEXT("[StrateManager] Operator-stack opt-in: %d/%d cave layout slots have Use Operator Stack disabled. These slots cannot use operator-stack ClassifyBox/T1.d; enable the asset setting on the listed definitions if that is intended."),
-            NumOperatorStackDisabledCaves, NumCaveSlots);
-
-        if (bQuietDiagnostic) { UE_LOG(LogTemp, Verbose, TEXT("%s"), *Summary); }
-        else                  { UE_LOG(LogTemp, Warning, TEXT("%s"), *Summary); }
-    }
-    else
-    {
-        UE_LOG(LogTemp, Log,
-            TEXT("[StrateManager] Operator-stack opt-in: all %d cave layout slots have Use Operator Stack enabled."),
-            NumCaveSlots);
-    }
-
-    for (const FStrateSlot& Slot : StrateLayout)
-    {
-        const bool bSeasonStack = bUseSeason
-            && SeasonStrates[Slot.StrateIndex].bUsesRecipe;
-        const ECaveGeneratorType SlotArchetype = bUseSeason
-            ? SeasonStrates[Slot.StrateIndex].Archetype : Slot.Definition->GeneratorType;
-        if (!Slot.Definition
-            || SlotArchetype == ECaveGeneratorType::SurfaceWorld
-            || (bUseSeason ? bSeasonStack : Slot.Definition->bUseOperatorStack))
-        {
-            continue;
-        }
-
-        const FString Line = FString::Printf(
-            TEXT("[StrateManager]   cave slot=%d name='%s' Z chunks=[%d to %d] bUseOperatorStack=false"),
-            Slot.StrateIndex,
-            *Slot.Definition->StrateName.ToString(),
-            Slot.TopChunkZ,
-            Slot.BottomChunkZ);
-
-        if (bQuietDiagnostic) { UE_LOG(LogTemp, Verbose, TEXT("%s"), *Line); }
-        else                  { UE_LOG(LogTemp, Warning, TEXT("%s"), *Line); }
-    }
-
     CachedSeed = WorldSeed;
     bOpenSurfaceEntry = Settings->bOpenSurfaceEntry;
     OriginSpineRadius = bUseSeason
@@ -6281,30 +6205,13 @@ bool UVoxelStrateManager::UsesOperatorStackForChunk(const FIntVector& ChunkCoord
     const int32 SlotIdx = FindSlotIndexForChunkZ(ChunkCoord.Z);
     if (SlotIdx < 0 || !StrateLayout[SlotIdx].Definition) { return false; }
 
-    if (SeasonStrates.IsValidIndex(SlotIdx))
+    // Every strate is generated by the operator stack: authored definitions, cooked-season entries
-    {
+    // (recipe or native) and editor composer candidates alike. The slot definition carries the
-        // A recipe is an explicit stack opt-in. Native fixed entries retain the authored/switch
+    // archetype in every case.
-        // route while still reading their season parameter vector.
-        return SeasonStrates[SlotIdx].bUsesRecipe;
-    }
-
-#if WITH_EDITOR
-    if (FindComposerOverride(StrateLayout[SlotIdx].StrateIndex) != nullptr)
-    {
-        // Temporary composer candidates are measured through the stack path. Do not inherit an
-        // unrelated asset flag from the slot being replaced.
-        return true;
-    }
-#endif
-
     const UVoxelStrateDefinition* Def = StrateLayout[SlotIdx].Definition;
-    if (!Def->bUseOperatorStack) { return false; }
 
-    // LA LISTE DES ARCHÉTYPES PORTÉS — le seul endroit où elle est écrite. Un archétype non porté
+    // LA LISTE DES ARCHÉTYPES — le seul endroit où elle est écrite.
-    // ignore le drapeau et retombe sur le `switch`, pour qu'on puisse cocher la case sur n'importe
+    // THE ARCHETYPE LIST, written down exactly once.
-    // quelle strate sans rien casser en attendant son portage.
-    // THE PORTED-ARCHETYPE LIST, written down exactly once. An unported archetype ignores the flag
-    // and falls back to the switch, so the box can be ticked anywhere without breaking anything.
     switch (Def->GeneratorType)
     {
     case ECaveGeneratorType::Maze:            return true;
@@ -6327,16 +6234,13 @@ bool UVoxelStrateManager::UsesOperatorStackForChunk(const FIntVector& ChunkCoord
 
     case ECaveGeneratorType::Underwater:
         // ⚠️ AUCUNE PILE À ELLE : `Underwater` EST `TunnelNetwork` plus un drapeau d'eau consommé
-        // côté rendu. `GetDensityAt` les met dans le même `case`, et `WaterLevelRelative` n'est lu
+        // côté rendu. `VF_BuildOpStackForChunk` les met dans le même `case`, et `WaterLevelRelative` n'est lu
         // que par `GetWaterLevel*` de ce manager — jamais par la densité (vérifié, pas supposé).
     case ECaveGeneratorType::TunnelNetwork:
         // Le plus gros : squelette SDF → douze modificateurs de détail → override d'op par salle,
         // 19 opérateurs, dont `FRoomGraphSource` qui **APPELLE** `BuildChunkCache`/`EvaluateSDFCached`
         // au lieu de les transcrire — c'est là que vit la discipline d'invariance de fenêtre
         // d'ARCHITECTURE §8.4 ; en forker une copie la casserait.
-        //
-        // **8 SUR 8.** Le `switch` d'archétypes a un jumeau en pile d'opérateurs, opt-in par
-        // strate, chacun vérifié par un test d'équivalence bit à bit contre sa fonction d'origine.
         return true;
 
     default:                                  return false;

Source/VoxelForge/Public/VoxelDensityOp.h

@@ -1,34 +1,32 @@
 // VoxelDensityOp.h
 // LE CONTRAT de la pile d'opérateurs de densité / THE density operator stack CONTRACT.
-// Design : Docs/archive/OPSTACK-PLAN.md. The contract is implemented by the opt-in stack path in
+// Design : Docs/archive/OPSTACK-PLAN.md. The contract is implemented by the stack path in
-// UVoxelGenerator::GetDensityAt; the legacy archetype switch remains for non-opt-in strates.
+// UVoxelGenerator::GetDensityAt, which generates every strate.
 //
 // ─────────────────────────────────────────────────────────────────────────────────────────
 // POURQUOI / WHY
 // ─────────────────────────────────────────────────────────────────────────────────────────
-// UVoxelGenerator::GetDensityAt est aujourd'hui un `switch` sur 8 ECaveGeneratorType, chacun
+// Chaque archétype (ECaveGeneratorType) est une composition d'opérateurs, pas une fonction de
-// possédant sa fonction de densité et son struct de params. Conséquences : une nouvelle idée de
+// densité monolithique qui posséderait le voxel entier. Une idée de monde s'exprime en empilant
-// monde coûte ~6 sites d'édition, et surtout LES IDÉES NE PEUVENT PAS SE COMBINER — un archétype
+// sources, combinateurs et modificateurs — et les idées peuvent donc SE COMBINER : « une strate de
-// possède le voxel entier. On ne peut pas écrire « une strate de surface dont les montagnes
+// surface dont les montagnes contiennent un réseau de salles, avec des îles flottantes au-dessus ».
-// contiennent un réseau de salles, avec des îles flottantes dans le vide au-dessus », à aucun prix.
 //
-// GetDensityAt is today a `switch` over 8 ECaveGeneratorType, each owning a bespoke density
+// Each archetype (ECaveGeneratorType) is a composition of operators, not a monolithic density
-// function and param struct. A new world idea costs ~6 edit sites, and — the real problem —
+// function that owns the whole voxel. A world idea is expressed by stacking sources, combiners and
-// IDEAS CANNOT COMBINE: one archetype owns the whole voxel.
+// modifiers — so ideas can COMBINE.
 //
 // ─────────────────────────────────────────────────────────────────────────────────────────
 // ⚠️ CE N'EST PAS L'ANCIEN SYSTÈME DE « ROOM OPERATIONS » / THIS IS NOT THE OLD ROOM-OPS SYSTEM
 // ─────────────────────────────────────────────────────────────────────────────────────────
 // UVoxelTerrainOpDefinition (Terrace, Ribbing, Cliff, Scallop, Overhang, Arch, Column, Pit…) ne
 // sait que PERTURBER une densité près d'une surface qui existe déjà. Il ne décide jamais ce que le
-// champ EST — cette décision vit dans le `switch`. Une pile d'opérateurs qui se contenterait de
+// champ EST — c'est le rôle des sources de champ ci-dessous.
-// cela aurait reconstruit le switch avec des étapes en plus.
 //
 // D'où QUATRE RÔLES, dont l'ancien système n'occupait que le troisième :
 //
 //   1. FIELD SOURCE      — fabrique un champ À PARTIR DE RIEN. C'est ce qui fait qu'une grotte est
 //                          une grotte et qu'un monde ouvert est un monde ouvert. Chaque archétype
-//                          d'aujourd'hui est fondamentalement l'une de ces sources.
+//                          est fondamentalement l'une de ces sources.
 //   2. COMBINER          — comment deux champs fusionnent (min/max/smooth/mask). C'EST le rôle qui
 //                          achète la composition ; sans lui il n'y a pas de refactor.
 //   3. DETAIL MODIFIER   — l'ancien système, rétrogradé à un rôle sur quatre. Inchangé.
@@ -56,9 +54,8 @@
 // An SDF-only writer reports an SDF interval; a later converter folds that interval through its own
 // response. Each operator answers for itself, so an unverified composition remains sound.
 //
-// La première version de cette interface n'avait qu'une direction numérique. Presque tout opérateur
+// Presque tout opérateur est UNIDIRECTIONNEL : il ne fait que creuser, ou que remplir. La direction
-// existant est UNIDIRECTIONNEL : il ne fait que creuser, ou que remplir. Cela suffit à reproduire
+// suffit donc à exprimer GÉNÉRIQUEMENT les gardes de ClassifyTile :
-// GÉNÉRIQUEMENT chaque garde écrite à la main dans ClassifyTile :
 //
 //     « passages ⇒ bCanSolid = false »        EST     CarveOnly
 //     « ponts/arêtes ⇒ bCanAir = false »      EST     FillOnly
@@ -71,26 +68,16 @@
 // it never lets an SDF writer impersonate a downstream neighbour.
 //
 // ─────────────────────────────────────────────────────────────────────────────────────────
-// LE GROS LOT PERF : les strates de grotte ne sautent AUCUNE tuile aujourd'hui
+// CLASSIFYTILE
-// THE PERF PRIZE: cave strates skip ZERO tiles today
 // ─────────────────────────────────────────────────────────────────────────────────────────
-// ClassifyTile conserve ses preuves exactes pour les gaps de bedrock et SurfaceWorld ; les
+// ClassifyTile garde ses preuves exactes pour les gaps de bedrock et SurfaceWorld ; les slots de
-// archétypes de cave opt-in passent maintenant par le même pliage `ClassifyBox`. Le post XY fournit
+// cave passent par le pliage `ClassifyBox` de la pile même qui produit leur densité. Le post XY
-// en plus la première preuve globale de coque : une tuile entièrement dans la bande forcée peut être
+// fournit en plus une preuve globale de coque : une tuile entièrement dans la bande forcée peut être
 // sautée sans connaître l'archétype ou le Z.
 //
-// **Traiter cela comme un livrable explicite de chaque portage, pas comme un effet de bord.**
+// ClassifyTile keeps its exact proofs for bedrock gaps and SurfaceWorld; cave slots go through the
-//
+// `ClassifyBox` fold of the same stack that produces their density. The XY post adds a global
-// ─────────────────────────────────────────────────────────────────────────────────────────
+// shell proof: a tile entirely inside the forced band is skipped without knowing archetype or Z.
-// ÉTAT / STATUS
-// ─────────────────────────────────────────────────────────────────────────────────────────
-// Les huit archétypes ont maintenant une pile derrière l'opt-in `bUseOperatorStack`, et ClassifyTile
-// utilise cette pile pour les slots de cave opt-in. Le chemin legacy reste disponible pour les
-// strates non opt-in; les tests d'équivalence servent de garde de portage.
-//
-// All eight archetypes now have an operator-stack path behind `bUseOperatorStack`, and ClassifyTile
-// uses that stack for opt-in cave slots. The legacy switch remains available for opt-out strates;
-// equivalence tests are port-correctness guards.
 //
 // NOTE sur les UENUM : ces types sont volontairement du C++ nu (pas d'UHT, pas de .generated.h).
 // Ils deviendront UENUM/USTRUCT en Phase 3, quand les opérateurs deviendront des data assets et

Source/VoxelForge/Public/VoxelDensityOpStack.h

@@ -2,33 +2,21 @@
 // La PILE : un conteneur ordonné d'opérateurs, plus les fabriques d'opérateurs concrets.
 // The STACK: an ordered container of operators, plus the concrete-operator factories.
 //
-// ⚠️ CECI ALIMENTE LE JEU, MAIS SEULEMENT SUR OPT-IN.
+// ⚠️ CECI EST LE CHEMIN DE GÉNÉRATION DU JEU.
-// `UVoxelGenerator::GetDensityAt` construit la pile par chunk et l'évalue à la place du `switch`
+// `UVoxelGenerator::GetDensityAt` construit la pile par chunk pour chaque strate :
-// UNIQUEMENT quand `UVoxelStrateManager::UsesOperatorStackForChunk` rend true — c.-à-d. quand la
-// strate a coché `bUseOperatorStack` ET que son archétype figure dans la liste des portés :
 // **Maze, FlatPlain, CrystalChamber, SurfaceWorld, VerticalShafts, FloatingIslands, TunnelNetwork,
-// Underwater (8 sur 8)**.
+// Underwater (8 sur 8)**. `ClassifyTile` construit la même pile pour les archétypes de cave et plie
-// Toute autre strate passe encore par le `switch`, inchangé.
+// `ClassifyBox`; les gaps et SurfaceWorld gardent leurs preuves exactes dédiées.
-// `ClassifyTile` est branché pour les archétypes de cave opt-in : il construit la même pile et
-// plie `ClassifyBox`; les gaps et SurfaceWorld gardent leurs preuves exactes dédiées.
 //
-// THIS FEEDS THE GAME, BUT ONLY BEHIND AN OPT-IN. GetDensityAt builds the stack per chunk and
+// THIS IS THE GAME'S GENERATION PATH. GetDensityAt builds the stack per chunk for every strate.
-// evaluates it instead of the switch only when UsesOperatorStackForChunk returns true (strate ticked
+// ClassifyTile uses the same stack for cave archetypes; gaps and SurfaceWorld retain their exact
-// bUseOperatorStack AND its archetype is ported — all 8). ClassifyTile uses the same stack for cave
+// hand-written proofs.
-// archetypes; gaps and SurfaceWorld retain their exact hand-written proofs.
-//
-// ⛔ NE JAMAIS faire tourner les deux chemins dans le même monde.
-// ⚠️ EN REVANCHE, LES COMPARER EST LÉGITIME. `AUDIT §C10` (le résidu ~1 ULP) est clos par
-// `FPSemantics = Precise` : les cinq tests d'équivalence comparent bit à bit. Ce ne sont pas des
-// contrôles de FIDÉLITÉ (la barre `§2.6.1` n'exige aucune ressemblance avec l'ancien monde) mais
-// des oracles de CORRECTION DE PORTAGE — une faute de transcription reste un vrai bug, et l'ancienne fonction est
-// le moyen le moins cher de l'attraper.
 //
 // POURQUOI CETTE FORME / WHY THIS SHAPE
 // La question à laquelle cette forme répond n'est pas « est-ce que ça marche ? » mais
 // **« est-ce que la séparation source / modifier tombe naturellement du code existant ? »**
-// (OPSTACK-PLAN §4). Chaque archétype porté est comparé bit à bit à l'original : la réponse est
+// (OPSTACK-PLAN §4). Chaque archétype a été porté puis comparé bit à bit à sa fonction
-// MESURÉE plutôt qu'une opinion.
+// d'origine avant qu'elle ne soit retirée : la réponse a été MESURÉE plutôt qu'une opinion.
 
 #pragma once
 

Source/VoxelForge/Public/VoxelGenerator.h

@@ -414,7 +414,7 @@ public:
      *
      * GAP (bedrock), hors-layout (air constant) et SurfaceWorld plient leurs hypothèses par Z ;
      * SurfaceWorld évalue ses colonnes terrain/plafond avec le MÊME ComputeSurfaceColumn que le
-     * chemin densité. Un unique slot cave opt-in peut ajouter le verdict conservatif de sa pile,
+     * chemin densité. Un unique slot cave peut ajouter le verdict conservatif de sa pile,
      * sous gardes d'archétype et de params bit-identiques. Spine/passages/disturbances/diff restent
      * des gardes conservatrices. Worker-safe (lecture seule + caches thread_local partagés avec
      * GetDensityAt — un verdict Mixed laisse les colonnes chaudes pour la génération qui suit).

Source/VoxelForge/Public/VoxelStats.h

@@ -14,10 +14,6 @@ DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Tiles Skipped All Air"), STAT_VoxelForge
 DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Tiles Meshed"), STAT_VoxelForgeTilesMeshed, STATGROUP_VoxelForge, VOXELFORGE_API);
 DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Tiles Operator Stack Solid"), STAT_VoxelForgeTilesOpStackSolid, STATGROUP_VoxelForge, VOXELFORGE_API);
 DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Tiles Operator Stack Air"), STAT_VoxelForgeTilesOpStackAir, STATGROUP_VoxelForge, VOXELFORGE_API);
-DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Cave Bail Not Op Stack Sole Slot"), STAT_VoxelForgeCaveBailNotOpStackSoleSlot, STATGROUP_VoxelForge, VOXELFORGE_API);
-DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Cave Bail Not Op Stack Boundary Tile"), STAT_VoxelForgeCaveBailNotOpStackBoundaryTile, STATGROUP_VoxelForge, VOXELFORGE_API);
-DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Cave Bail Not Op Stack No Layout"), STAT_VoxelForgeCaveBailNotOpStackNoLayout, STATGROUP_VoxelForge, VOXELFORGE_API);
-DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Cave Bail Not Op Stack Recheck"), STAT_VoxelForgeCaveBailNotOpStackRecheck, STATGROUP_VoxelForge, VOXELFORGE_API);
 DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Cave Mix Out Of Layout"), STAT_VoxelForgeCaveMixOutOfLayout, STATGROUP_VoxelForge, VOXELFORGE_API);
 DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Cave Mix Gap"), STAT_VoxelForgeCaveMixGap, STATGROUP_VoxelForge, VOXELFORGE_API);
 DECLARE_DWORD_COUNTER_STAT_EXTERN(TEXT("Cave Mix Surface World"), STAT_VoxelForgeCaveMixSurfaceWorld, STATGROUP_VoxelForge, VOXELFORGE_API);

Source/VoxelForge/Public/VoxelStrateDefinition.h

@@ -115,29 +115,6 @@ public:
     UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Strate|Generation")
     ECaveGeneratorType GeneratorType = ECaveGeneratorType::TunnelNetwork;
 
-    /**
-     * OPERATOR STACK (experimental) — generate this strate through the composable density operator
-     * stack instead of the hardcoded archetype switch. Same world, different machinery.
-     *
-     * This is the A/B switch for `OPSTACK-PLAN §2.6`'s acceptance bar: flip it, regenerate, and
-     * judge on a screenshot that it is recognisably the same place. Both systems coexist
-     * indefinitely — the switch is not going away until every archetype is ported.
-     *
-     * ⚠️ ONLY `Maze` IS PORTED SO FAR. On any other GeneratorType this flag is ignored and the
-     * switch runs as before, so setting it is harmless but does nothing yet.
-     *
-     * ⚠️ Do NOT flip this on a strate mid-session and expect the old and new geometry to agree to
-     * the bit — they differ by ~1-2 ULP with ZERO isosurface crossings, so the shape is identical
-     * but the floats are not (`Docs/archive/AUDIT-2026-07.md §C10`). Regenerate the world after changing it
-     * rather than letting old and new tiles sit side by side.
-     *
-     * Pile d'opérateurs (expérimental) : génère cette strate via la pile composable au lieu du
-     * `switch` d'archétype. Seul `Maze` est porté ; ailleurs le drapeau est ignoré.
-     */
-    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Strate|Generation",
-        meta = (DisplayName = "Use Operator Stack (experimental)"))
-    bool bUseOperatorStack = false;
-
     /**
      * Authoritative per-strate worm switch. Existing assets default to enabled. The manager
      * resolves a disabled strate to WormStrength == 0 before any fused, stack, composer, or

Source/VoxelForge/Public/VoxelStrateManager.h

@@ -294,7 +294,7 @@ public:
      *
      * Returns TunnelNetwork if the chunk is outside all strates or if the
      * strate definition is null. The generator uses this to pick which
-     * density function to call (GetDensityWithParams vs GetSlabDensity).
+     * operator stack to build for the chunk.
      *
      * @param ChunkCoord - The chunk position
      * @return The ECaveGeneratorType for the strate containing this chunk
@@ -302,12 +302,9 @@ public:
     ECaveGeneratorType GetGeneratorTypeForChunk(const FIntVector& ChunkCoord) const;
 
     /**
-     * True when this chunk's strate opts into the density OPERATOR STACK instead of the hardcoded
+     * True when this chunk lies in a strate slot whose archetype has an operator stack (all eight
-     * archetype switch (`UVoxelStrateDefinition::bUseOperatorStack`).
+     * do). False outside the layout or for a slot without a definition. This predicate is the ONLY
-     *
+     * place the archetype list is written down.
-     * Returns false for archetypes that have no port yet, so the flag can be set on any strate
-     * without changing its output until that archetype lands. Only `Maze` is ported today — this
-     * predicate is where that list grows, and it is deliberately the ONLY place it is written down.
      */
     bool UsesOperatorStackForChunk(const FIntVector& ChunkCoord) const;
 

Source/VoxelForgeEditor/Private/VoxelForgeExploreCommandlet.cpp

@@ -314,7 +314,6 @@ struct FExploreArguments
     bool bRender = true;
     bool bWalk = true;
     bool bExport = true;
-    bool bUseOperatorStack = true;
     bool bWormsEnabledOverride = false;
     bool bWormsEnabled = true;
     bool bWormStrengthOverride = false;
@@ -431,9 +430,6 @@ bool ParseArguments(const FString& Params, FExploreArguments& OutArguments, FStr
         }
         ModesText.TrimQuotesInline();
     }
-    int32 UseOperatorStack = 1;
-    FParse::Value(*Params, TEXT("opstack="), UseOperatorStack);
-    OutArguments.bUseOperatorStack = UseOperatorStack != 0;
     int32 WormsEnabled = 1;
     if (FParse::Value(*Params, TEXT("wormsenabled="), WormsEnabled))
     {
@@ -1218,9 +1214,6 @@ struct FExploreWorld
                 Definition->GeneratorType = Index == Arguments.Slot
                     ? Arguments.Archetype
                     : ECaveGeneratorType::TunnelNetwork;
-                // Explicitly select the production switch so the same synthetic layout, seed and
-                // mesher invocation can be measured through both density branches.
-                Definition->bUseOperatorStack = Arguments.bUseOperatorStack;
                 if (Arguments.bWormsEnabledOverride)
                 {
                     Definition->bEnableWorms = Arguments.bWormsEnabled;
@@ -1376,7 +1369,7 @@ struct FExploreWorld
         const FStrateGenerationParams& ReportParams = Target.Definition->GenerationParams;
         UE_LOG(LogTemp, Display,
             TEXT("[VoxelForgeExplore][OwnerAssets] strate=%s settings=%s slot=%d "
-                 "seed=%d height_chunks=%d archetype=%s opstack=%d "
+                 "seed=%d height_chunks=%d archetype=%s "
                  "floor_switch_ignored=1 floor_terracing=%d floor_step=%.9g max_ledge=%.9g "
                  "gentle_slope_degrees=%.9g gentle_gradient=%.9g route_cap=%.9g "
                  "wind_wave_cap=%d "
@@ -1385,7 +1378,7 @@ struct FExploreWorld
             bUseAuthoredStrate ? *Arguments.StrateReference : TEXT("synthetic"),
             bUseAuthoredSettings ? *Arguments.SettingsReference : TEXT("synthetic"),
             Arguments.Slot, Settings->Seed, Target.Definition->StrateHeightInChunks,
-            ArchetypeName(TargetArchetype), Target.Definition->bUseOperatorStack ? 1 : 0,
+            ArchetypeName(TargetArchetype),
             ReportParams.bTunnelFloorTerracingEnabled ? 1 : 0,
             ReportParams.TunnelFloorTerraceStepHeight,
             ReportParams.TunnelFloorMaxLedgeHeight,
@@ -4453,7 +4446,6 @@ FString BuildManifestJson(
     Writer->WriteValue(TEXT("seed"), Arguments.Seed);
     Writer->WriteValue(TEXT("archetype"), ArchetypeName(Arguments.Archetype));
     Writer->WriteValue(TEXT("slot"), Arguments.Slot);
-    Writer->WriteValue(TEXT("operator_stack"), Arguments.bUseOperatorStack);
     Writer->WriteValue(TEXT("worms_enabled_override"), Arguments.bWormsEnabledOverride);
     if (Arguments.bWormsEnabledOverride)
     {
@@ -6135,7 +6127,6 @@ FString BuildExploreJson(
     Writer->WriteValue(TEXT("seed"), Arguments.Seed);
     Writer->WriteValue(TEXT("archetype"), ArchetypeName(Arguments.Archetype));
     Writer->WriteValue(TEXT("slot"), Arguments.Slot);
-    Writer->WriteValue(TEXT("operator_stack"), Arguments.bUseOperatorStack);
     Writer->WriteValue(TEXT("worms_enabled_override"), Arguments.bWormsEnabledOverride);
     if (Arguments.bWormsEnabledOverride)
     {
@@ -6216,12 +6207,11 @@ FString BuildExploreJson(
     Writer->WriteValue(TEXT("out_directory"), Arguments.OutDirectory);
     Writer->WriteValue(TEXT("canonical_invocation"), FString::Printf(
         TEXT("UnrealEditor-Cmd VoxelM.uproject -run=VoxelForgeExplore -seed=%d -archetype=%s "
-             "-slot=%d -opstack=%d -modes=%s -blockearlyout=%d "
+             "-slot=%d -modes=%s -blockearlyout=%d "
              "-out=<ABSOLUTE_PLUGIN_SAVED_PATH>"),
         Arguments.Seed,
         ArchetypeName(Arguments.Archetype),
         Arguments.Slot,
-        Arguments.bUseOperatorStack ? 1 : 0,
         *Arguments.CanonicalModes(),
         Arguments.bBlockEarlyOut ? 1 : 0));
     Writer->WriteObjectEnd();
@@ -7203,7 +7193,6 @@ bool WriteExploreOpBoundsReport(
     Writer->WriteValue(TEXT("seed"), Arguments.Seed);
     Writer->WriteValue(TEXT("archetype"), ArchetypeName(Arguments.Archetype));
     Writer->WriteValue(TEXT("slot"), Arguments.Slot);
-    Writer->WriteValue(TEXT("operator_stack"), Arguments.bUseOperatorStack);
     Writer->WriteValue(TEXT("sample_step"), 1);
     Writer->WriteValue(TEXT("block_cells"), 8);
     Writer->WriteValue(TEXT("classifier_blocks_tested"), BlocksTested);
@@ -7311,10 +7300,9 @@ bool RunOpBounds(
     FExploreBudget& Budget,
     FString& OutError)
 {
-    if (Arguments.Archetype != ECaveGeneratorType::TunnelNetwork
+    if (Arguments.Archetype != ECaveGeneratorType::TunnelNetwork)
-        || !Arguments.bUseOperatorStack)
     {
-        OutError = TEXT("opbounds requires archetype=TunnelNetwork and opstack=1.");
+        OutError = TEXT("opbounds requires archetype=TunnelNetwork.");
         return false;
     }
 
@@ -8262,8 +8250,6 @@ bool BuildBatchCaseParams(
 
     FString Modes = TEXT("export");
     JsonString(Case, TEXT("modes"), Modes);
-    bool bOperatorStack = true;
-    JsonBool(Case, TEXT("operator_stack"), bOperatorStack);
     bool bProfileDensity = false;
     JsonBool(Case, TEXT("profile_density"), bProfileDensity);
     bool bProfileDensityFull = false;
@@ -8293,11 +8279,11 @@ bool BuildBatchCaseParams(
         Case, TEXT("tunnel_floor_terracing"), bTunnelFloorTerracing);
 
     OutParams = FString::Printf(
-        TEXT("-seed=%d -archetype=%s -slot=%d -modes=%s -opstack=%d "
+        TEXT("-seed=%d -archetype=%s -slot=%d -modes=%s "
              "-exportsize=%d -exportstep=%d -densitygridreuse=%d "
              "-blockearlyout=%d -meshminbatch=%d "
              "-failurefocus=%d -out=\"%s\""),
-        Seed, *Archetype, Slot, *Modes, bOperatorStack ? 1 : 0,
+        Seed, *Archetype, Slot, *Modes,
         ExportSize, ExportStep, bReuseDensityGrid ? 1 : 0,
         bBlockEarlyOut ? 1 : 0, MeshMinBatchSize,
         bFailureFocus ? 1 : 0, *CaseOutDirectory);

Tools/VoxelForgeTest.ps1

@@ -633,7 +633,6 @@ function New-CommandletArguments([string]$CommandletOut, [string]$Modes, [bool]$
     [void]$args.Add('-seed=0')
     [void]$args.Add('-archetype=TunnelNetwork')
     [void]$args.Add("-slot=$Slot")
-    [void]$args.Add('-opstack=1')
     [void]$args.Add(('-modes="{0}"' -f $Modes))
     [void]$args.Add('-blockearlyout=0')
     [void]$args.Add('-densitygridreuse=1')