skip: passage proof bounds include wall/floor relief (L75 soundness fix); FI -7.6%

L74's passage bound omitted the 0.21 m wall relief and 0.20 m floor relief, so its whole-tile
proof was unsound in principle (no tested view hit it). Passage support is now bounded per route
segment by four parameter-subinterval boxes using Catmull-Rom derivative extrema, local max
radius and relief padding. Stratum slicing only at LOD0-2 in FI/VS. Legacy sub-tile block
certificates are audit-only (runtime version was slower). TN regression (-80,-20,-3218) kept.

Exact full-grid vs skip hashes on every tile, 4 views, Clang/GCC, W1/W8/W12; control caught;
80-camera sweep 0 violations. Whole view vs c67b200: SW -1.3%, FI -7.6%, TN -2.3%, VS +0.2%.
Compiles in the Linux UE host (VFHostEditor, 27/27 actions).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1

Standalone/Core/include/VoxelForgeCore/VoxelForgeCore.h

@@ -252,6 +252,9 @@ namespace VoxelForgeCore
         std::uint32_t farHorizonVersion = 0;
         bool farShellRepairSkipped = false;
         bool tileWasClassified = false;
+        std::uint8_t tileProofVetoReason = 0;
+        bool tileProofSafe = false;
+        bool tileLegacyBlockProofRelevant = false;
         bool meshingSkipped = false;
         bool featureRefinedResolution = false;
         bool heightfieldBandLimited = false;

Standalone/Core/src/ShapeWorldInternal.h

@@ -1570,8 +1570,29 @@ public:
                 *floorAlignment*floorAlignment*floorBelowWeight*mouthWalkLaneWeight;
             const float fullyCarvedDensity=std::max(composed,
                 static_cast<float>(-roughSignedDistance/Q));
+            static const bool bL75TraceTnPassage=[]
+            {
+                const char* Value=std::getenv("VOXELFORGE_L75_TN_BLOCK_REGRESSION");
+                return Value&&Value[0]=='1'&&Value[1]=='\0';
+            }();
+            const float passageInput=composed;
             composed=std::lerp(composed,fullyCarvedDensity,
                 static_cast<float>(floorCarveWeight));
+            if(bL75TraceTnPassage&&X==-80.0f&&Y==-20.0f&&Z==-3218.0f
+                &&composed!=passageInput)
+            {
+                const auto& traceA=passage.controlPoints[static_cast<std::size_t>(bestIndex)];
+                const auto& traceB=passage.controlPoints[static_cast<std::size_t>(bestIndex+1)];
+                std::printf("[L75TNPassageTrace] passage=%zu segment=%td t=%.9g input=%.9g output=%.9g signed=%.9g rough=%.9g carve_weight=%.9g bounds=(%lld,%lld,%lld)..(%lld,%lld,%lld)\n",
+                    passageIndex,bestIndex,bestT,passageInput,composed,bestSignedDistance,
+                    roughSignedDistance,floorCarveWeight,
+                    static_cast<long long>(std::min(traceA.positionSubvoxels[0],traceB.positionSubvoxels[0])),
+                    static_cast<long long>(std::min(traceA.positionSubvoxels[1],traceB.positionSubvoxels[1])),
+                    static_cast<long long>(std::min(traceA.positionSubvoxels[2],traceB.positionSubvoxels[2])),
+                    static_cast<long long>(std::max(traceA.positionSubvoxels[0],traceB.positionSubvoxels[0])),
+                    static_cast<long long>(std::max(traceA.positionSubvoxels[1],traceB.positionSubvoxels[1])),
+                    static_cast<long long>(std::max(traceA.positionSubvoxels[2],traceB.positionSubvoxels[2])));
+            }
             const float composedAfterCarve=composed;
             const auto considerSupportSegment=[&](std::ptrdiff_t index)
             {
@@ -1999,15 +2020,31 @@ public:
         const float composed=nativeLattice?boundary
             :ApplyResolvedStratePassageCarves(boundary,X,Y,Z);
         const float stamped=StampRuntime.empty()?composed:ApplyResolvedSdfStamps(composed,X,Y,Z);
+        static const bool bL75TraceTnComposition=[]
+        {
+            const char* Value=std::getenv("VOXELFORGE_L75_TN_BLOCK_REGRESSION");
+            return Value&&Value[0]=='1'&&Value[1]=='\0';
+        }();
+        const bool bTraceTnComposition=bL75TraceTnComposition
+            &&X==-80.0f&&Y==-20.0f&&Z==-3218.0f;
         if(bound&&bound->Kind==FBoundStratumField::EKind::Caves
             &&bound->Resolved&&VoxelForgeCore::HasNativeGraphField(*bound->Resolved)
             &&(VoxelForgeCore::IsNativeCaveFieldStratum(*bound->Resolved)
                 ?bound->Resolved->passageCapabilities.hasNativeCaveField
                 :bound->Resolved->passageCapabilities.hasNativeLatticeField))
+        {
+            if(bTraceTnComposition)
+                std::printf("[L75TNCompositionTrace] input=%.9g graph=%.9g boundary=%.9g passage=%.9g stamp=%.9g native=1\n",
+                    density,graphDensity,boundary,composed,stamped);
             return stamped;
+        }
         // The legacy landmark demo retains its compatibility floor cap. Native caves
         // already combine each floor with its wall before the single void carve above.
-        return ApplyResolvedCavernFloorCaps(stamped,X,Y,Z);
+        const float final=ApplyResolvedCavernFloorCaps(stamped,X,Y,Z);
+        if(bTraceTnComposition)
+            std::printf("[L75TNCompositionTrace] input=%.9g graph=%.9g boundary=%.9g passage=%.9g stamp=%.9g final=%.9g native=0\n",
+                density,graphDensity,boundary,composed,stamped,final);
+        return final;
     }
 
     bool ResolvedPassageIntersectsBox(const int32 minimum[3],const int32 maximum[3]) const
@@ -2157,6 +2194,14 @@ public:
         bool bNativeSurface=false;
         bool bUnknown=false;
         bool bSkipSafe=false;
+        bool bLegacyFieldCandidate=false;
+        bool bLegacyBlockProofRelevant=false;
+        std::uint8_t LegacyProofVeto=0;
+    };
+    enum class ELegacyProofVeto : std::uint8_t
+    {
+        None=0,DetailEnvelope=1,ComposerCandidate=2,PassageBounds=3,
+        PrimitiveOverlap=4,Transition=5,StratumCrossing=6,SmoothMinSlack=7,Other=8
     };
     struct FClassificationThreadStats
     {
@@ -2497,6 +2542,7 @@ public:
         WorkerCount=std::clamp(Workers,1,16);DetailVariant=Variant;
         Scheduler=InScheduler;RoundTunnelsEnabled=bInRoundTunnels;
         bUseNativeManifestFields=true;
+        UnbinnedSpatialPrimitiveIds.clear();
         BindResolvedStratumFields();
         bAnalyticOnly=false;
         bProfileDetailBand=bInProfileDetailBand;
@@ -3323,6 +3369,44 @@ public:
             return LegacySurfaceDensityAt(static_cast<float>(X),static_cast<float>(Y),
                 static_cast<float>(Z));
         const bool bPacked=!bAnalyticOnly&&Contains(X,Y,Z);
+        static const bool bL75TraceTnDensity=[]
+        {
+            const char* Value=std::getenv("VOXELFORGE_L75_TN_BLOCK_REGRESSION");
+            return Value&&Value[0]=='1'&&Value[1]=='\0';
+        }();
+        if(bL75TraceTnDensity&&X==-80&&Y==-20&&Z==-3218)
+        {
+            if(!bPacked)
+                std::printf("[L75TNDensityTrace] packed=0\n");
+            else
+            {
+            const size_t Column=static_cast<size_t>(Y-Min[1])*Size[0]
+                +static_cast<size_t>(X-Min[0]);
+            const size_t Zi=static_cast<size_t>(Z-Min[2]);
+            const size_t Word=Column*WordsPerZ+(Zi>>6);
+            const uint64 Mask=uint64{1}<<(Zi&63u);
+            const bool bRock=(RockWords[Word]&Mask)!=0;
+            const bool bCandidate=(CandidateWords[Word]&Mask)!=0;
+            const float Analytic=AnalyticDensityAt(static_cast<float>(X),
+                static_cast<float>(Y),static_cast<float>(Z),false);
+            std::printf("[L75TNDensityTrace] packed=%d rock=%d candidate=%d proxy=%d analytic=%.9g\n",
+                bPacked?1:0,bRock?1:0,bCandidate?1:0,
+                bCandidate?static_cast<int>(SurfaceDistanceQ[Zi*static_cast<size_t>(Size[1])*Size[0]
+                    +Column]):0,Analytic);
+            for(const uint32 Id:GetLineCandidates(2,X,Y))
+            {
+                if(Id>=Primitives.size())continue;
+                const FPrimitive& Primitive=Primitives[Id];
+                if(!Primitive.bCarve||X<Primitive.Min[0]||X>Primitive.Max[0]
+                    ||Y<Primitive.Min[1]||Y>Primitive.Max[1]
+                    ||Z<Primitive.Min[2]||Z>Primitive.Max[2])continue;
+                std::printf("[L75TNDensityTrace] primitive=%u carve=1 critical=%d bounds=(%d,%d,%d)..(%d,%d,%d) contains=%d sdf=%.9g\n",
+                    Id,Primitive.bCritical?1:0,Primitive.Min[0],Primitive.Min[1],Primitive.Min[2],
+                    Primitive.Max[0],Primitive.Max[1],Primitive.Max[2],
+                    ShapeContains(Primitive,X,Y,Z)?1:0,ShapeDistance(Primitive,X,Y,Z));
+            }
+            }
+        }
         if(bPacked)
             return PackedDensityAt(X,Y,Z,IsRock(X,Y,Z),static_cast<float>(X),
                 static_cast<float>(Y),static_cast<float>(Z));
@@ -4487,6 +4571,10 @@ private:
         const double qPerMetre=Q*voxelsPerMetre;
         const double bridgeHalfWidthVoxels=3.5*voxelsPerMetre;
         const double bridgeFootDepthVoxels=(5.0-0.13)*voxelsPerMetre;
+        // PassageWallRelief is bounded by 0.21 m along the route. Mouth floor
+        // relief is bounded by 0.20 m and only applies in the upper entry run.
+        const double passageWallReliefVoxels=0.21*voxelsPerMetre;
+        const double passageMouthFloorReliefVoxels=0.20*voxelsPerMetre;
         PassageColumnSegmentFlags.resize(ResolvedLayout->passages.size());
         PassageShortSpanSegmentFlags.resize(ResolvedLayout->passages.size());
         for(std::size_t passageIndex=0;passageIndex<ResolvedLayout->passages.size();++passageIndex)
@@ -4507,24 +4595,119 @@ private:
                 const auto& a=passage.controlPoints[segment];
                 const auto& b=passage.controlPoints[segment+1];
                 const double radius=static_cast<double>(std::max(a.radiusSubvoxels,b.radiusSubvoxels))/Q;
-                const double horizontalExtent=std::max(radius,bridgeHalfWidthVoxels);
+                const std::ptrdiff_t lastControl=static_cast<std::ptrdiff_t>(
+                    passage.controlPoints.size())-1;
+                const std::ptrdiff_t lowerMouthControl=std::clamp<std::ptrdiff_t>(
+                    static_cast<std::ptrdiff_t>(passage.lowerMouthControlIndex),1,lastControl);
+                const double dx=static_cast<double>(b.positionSubvoxels[0])
+                    -a.positionSubvoxels[0];
+                const double dy=static_cast<double>(b.positionSubvoxels[1])
+                    -a.positionSubvoxels[1];
+                const double dz=static_cast<double>(b.positionSubvoxels[2])
+                    -a.positionSubvoxels[2];
+                const bool bMayUseSmoothCarve=segment>2
+                    &&static_cast<std::ptrdiff_t>(segment)+2<lowerMouthControl
+                    &&DeterministicSqrt(dx*dx+dy*dy+dz*dz)<=8.0*qPerMetre;
+                const double mouthFloorReliefVoxels=segment<static_cast<std::size_t>(
+                    std::min<std::ptrdiff_t>(3,lowerMouthControl))
+                    ?passageMouthFloorReliefVoxels:0.0;
+                constexpr int32 ProofSubdivisions=4;
+                constexpr double OutwardPaddingVoxels=1.0e-6;
                 const double footDepth=std::max(voxelsPerMetre,bridgeFootDepthVoxels);
-                FPassageProofBound proof;
-                proof.minimum={std::min(a.positionSubvoxels[0],b.positionSubvoxels[0])/Q-horizontalExtent,
-                    std::min(a.positionSubvoxels[1],b.positionSubvoxels[1])/Q-horizontalExtent,
-                    std::min(a.positionSubvoxels[2],b.positionSubvoxels[2])/Q-radius-footDepth};
-                proof.maximum={std::max(a.positionSubvoxels[0],b.positionSubvoxels[0])/Q+horizontalExtent,
-                    std::max(a.positionSubvoxels[1],b.positionSubvoxels[1])/Q+horizontalExtent,
-                    std::max(a.positionSubvoxels[2],b.positionSubvoxels[2])/Q+radius};
-                PassageProofBounds.push_back(proof);
+                std::array<double,3> featureMinimum={
+                    std::numeric_limits<double>::infinity(),
+                    std::numeric_limits<double>::infinity(),
+                    std::numeric_limits<double>::infinity()};
+                std::array<double,3> featureMaximum={
+                    -std::numeric_limits<double>::infinity(),
+                    -std::numeric_limits<double>::infinity(),
+                    -std::numeric_limits<double>::infinity()};
+                const auto& p0=bMayUseSmoothCarve
+                    ?passage.controlPoints[segment-1]:a;
+                const auto& p3=bMayUseSmoothCarve
+                    ?passage.controlPoints[segment+2]:b;
+                for(int32 proofPart=0;proofPart<ProofSubdivisions;++proofPart)
+                {
+                    const double t0=static_cast<double>(proofPart)/ProofSubdivisions;
+                    const double t1=static_cast<double>(proofPart+1)/ProofSubdivisions;
+                    std::array<double,3> centerMinimum{},centerMaximum{};
+                    for(std::size_t axis=0;axis<3;++axis)
+                    {
+                        const double v0=static_cast<double>(p0.positionSubvoxels[axis])/Q;
+                        const double v1=static_cast<double>(a.positionSubvoxels[axis])/Q;
+                        const double v2=static_cast<double>(b.positionSubvoxels[axis])/Q;
+                        const double v3=static_cast<double>(p3.positionSubvoxels[axis])/Q;
+                        const double c0=v1;
+                        const double c1=0.5*(-v0+v2);
+                        const double c2=0.5*(2.0*v0-5.0*v1+4.0*v2-v3);
+                        const double c3=0.5*(-v0+3.0*v1-3.0*v2+v3);
+                        const auto evaluate=[&](double t)
+                        {
+                            return bMayUseSmoothCarve
+                                ?((c3*t+c2)*t+c1)*t+c0:v1+t*(v2-v1);
+                        };
+                        double low=std::min(evaluate(t0),evaluate(t1));
+                        double high=std::max(evaluate(t0),evaluate(t1));
+                        const double qa=3.0*c3,qb=2.0*c2,qc=c1;
+                        const auto includeRoot=[&](double t)
+                        {
+                            if(t<=t0||t>=t1||!std::isfinite(t))return;
+                            const double value=evaluate(t);
+                            low=std::min(low,value);high=std::max(high,value);
+                        };
+                        if(bMayUseSmoothCarve)
+                        {
+                            if(std::abs(qa)<=1.0e-12)
+                            {
+                                if(std::abs(qb)>1.0e-12)includeRoot(-qc/qb);
+                            }
+                            else
+                            {
+                                const double discriminant=qb*qb-4.0*qa*qc;
+                                if(discriminant>=0.0)
+                                {
+                                    const double root=std::sqrt(discriminant);
+                                    includeRoot((-qb-root)/(2.0*qa));
+                                    includeRoot((-qb+root)/(2.0*qa));
+                                }
+                            }
+                        }
+                        centerMinimum[axis]=low-OutwardPaddingVoxels;
+                        centerMaximum[axis]=high+OutwardPaddingVoxels;
+                    }
+                    const double radiusAt0=(static_cast<double>(a.radiusSubvoxels)
+                        +t0*(static_cast<double>(b.radiusSubvoxels)-a.radiusSubvoxels))/Q;
+                    const double radiusAt1=(static_cast<double>(a.radiusSubvoxels)
+                        +t1*(static_cast<double>(b.radiusSubvoxels)-a.radiusSubvoxels))/Q;
+                    const double partRadius=std::max(radiusAt0,radiusAt1);
+                    const double relievedRadius=partRadius+passageWallReliefVoxels
+                        +mouthFloorReliefVoxels+OutwardPaddingVoxels;
+                    const double horizontalExtent=std::max(relievedRadius,
+                        bridgeHalfWidthVoxels+OutwardPaddingVoxels);
+                    FPassageProofBound proof;
+                    proof.minimum={centerMinimum[0]-horizontalExtent,
+                        centerMinimum[1]-horizontalExtent,
+                        centerMinimum[2]-partRadius-footDepth-passageWallReliefVoxels
+                            -mouthFloorReliefVoxels-OutwardPaddingVoxels};
+                    proof.maximum={centerMaximum[0]+horizontalExtent,
+                        centerMaximum[1]+horizontalExtent,
+                        centerMaximum[2]+partRadius+passageWallReliefVoxels
+                            +mouthFloorReliefVoxels+OutwardPaddingVoxels};
+                    for(std::size_t axis=0;axis<3;++axis)
+                    {
+                        featureMinimum[axis]=std::min(featureMinimum[axis],proof.minimum[axis]);
+                        featureMaximum[axis]=std::max(featureMaximum[axis],proof.maximum[axis]);
+                    }
+                    PassageProofBounds.push_back(proof);
+                }
                 const std::array<std::int64_t,3> featureMin={
-                    static_cast<std::int64_t>(std::floor(proof.minimum[0]*Q)),
-                    static_cast<std::int64_t>(std::floor(proof.minimum[1]*Q)),
-                    static_cast<std::int64_t>(std::floor(proof.minimum[2]*Q))};
+                    static_cast<std::int64_t>(std::floor(featureMinimum[0]*Q)),
+                    static_cast<std::int64_t>(std::floor(featureMinimum[1]*Q)),
+                    static_cast<std::int64_t>(std::floor(featureMinimum[2]*Q))};
                 const std::array<std::int64_t,3> featureMax={
-                    static_cast<std::int64_t>(std::ceil(proof.maximum[0]*Q)),
-                    static_cast<std::int64_t>(std::ceil(proof.maximum[1]*Q)),
-                    static_cast<std::int64_t>(std::ceil(proof.maximum[2]*Q))};
+                    static_cast<std::int64_t>(std::ceil(featureMaximum[0]*Q)),
+                    static_cast<std::int64_t>(std::ceil(featureMaximum[1]*Q)),
+                    static_cast<std::int64_t>(std::ceil(featureMaximum[2]*Q))};
                 PassageFeatureBounds.push_back({static_cast<std::uint64_t>(PassageTileFeatures.size()),
                     featureMin,featureMax});
                 PassageTileFeatures.push_back({passageIndex,segment,false});
@@ -5965,8 +6148,22 @@ public:
     {
         if(SharedDensitySource)
             return SharedDensitySource->ClassifyBoxDetailed(Origin,Step,Cells,bUseNativeLatticeProof);
+        const int32 Pad=std::max(Step,1);
+        const int32 BMin[3]={Origin.X-Pad,Origin.Y-Pad,Origin.Z-Pad};
+        const int32 BMax[3]={Origin.X+(Cells+1)*Step,Origin.Y+(Cells+1)*Step,
+            Origin.Z+(Cells+1)*Step};
+        return ClassifyBoundsDetailed(BMin,BMax,std::max(Step,1),bUseNativeLatticeProof);
+    }
+
+    FBoxClassification ClassifyBoundsDetailed(const int32 InputMin[3],
+        const int32 InputMax[3],int32 SampleStep,bool bUseNativeLatticeProof=false) const
+    {
+        if(SharedDensitySource)
+            return SharedDensitySource->ClassifyBoundsDetailed(
+                InputMin,InputMax,SampleStep,bUseNativeLatticeProof);
         using Clock=std::chrono::steady_clock;
         const auto Start=Clock::now();
+        std::uint8_t LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::None);
         static const bool bL74TightNegativeControl=[]
         {
             const char* Value=std::getenv("VOXELFORGE_L74_TIGHT_PROOF_CONTROL");
@@ -5975,9 +6172,21 @@ public:
                 std::printf("[L74NegativeControl] enabled=1 bound=base-sign-only-detail-and-primitive-envelope-omitted\n");
             return Enabled;
         }();
-        const int32 Pad=std::max(Step,1);
-        int32 BMin[3]={Origin.X-Pad,Origin.Y-Pad,Origin.Z-Pad};
-        int32 BMax[3]={Origin.X+(Cells+1)*Step,Origin.Y+(Cells+1)*Step,Origin.Z+(Cells+1)*Step};
+        const int32 BMin[3]={InputMin[0],InputMin[1],InputMin[2]};
+        const int32 BMax[3]={InputMax[0],InputMax[1],InputMax[2]};
+        static const bool bL75TraceTnBlock=[]
+        {
+            const char* Value=std::getenv("VOXELFORGE_L75_TN_BLOCK_REGRESSION");
+            return Value&&Value[0]=='1'&&Value[1]=='\0';
+        }();
+        constexpr int32 ProbeX=-80,ProbeY=-20,ProbeZ=-3218;
+        const bool bTraceTnBlock=bL75TraceTnBlock
+            &&ProbeX>=BMin[0]&&ProbeX<=BMax[0]
+            &&ProbeY>=BMin[1]&&ProbeY<=BMax[1]
+            &&ProbeZ>=BMin[2]&&ProbeZ<=BMax[2];
+        if(bTraceTnBlock)
+            std::printf("[L75TNProofTrace] phase=enter step=%d bounds=(%d,%d,%d)..(%d,%d,%d)\n",
+                SampleStep,BMin[0],BMin[1],BMin[2],BMax[0],BMax[1],BMax[2]);
         const VoxelForgeCore::WorldAssemblyStratumPlanV1* SurfacePlan=nullptr;
         const VoxelForgeCore::WorldAssemblyFloatingIslandPlanV1* IslandPlan=nullptr;
         const FSurfaceWorldFieldAdapter* SurfaceField=nullptr;
@@ -5986,6 +6195,11 @@ public:
         bool bSurfaceOverlap=false,bIslandOverlap=false,bCavesOverlap=false;
         bool bOtherStrateOverlap=false,bLegacyOverlap=false,bCaveOtherStrateOverlap=false;
         bool bIslandOtherStrateOverlap=false,bBadPlan=false;
+        bool bMissingStratumBound=false;
+        bool bStratumSlicingExpectedToPay=false;
+        bool bLegacyFieldCandidate=WorldAssembly&&Owner&&Owner->Manager
+            &&ResolvedLayout&&Owner->Generator;
+        bool bLegacyBlockProofRelevant=false;
         std::vector<std::uint32_t> caveCandidates;
         if(Owner&&ResolvedLayout)
         {
@@ -5995,8 +6209,13 @@ public:
             for(int32 ChunkZ=FirstChunk;ChunkZ<=LastChunk;++ChunkZ)
             {
                 const FBoundStratumField* Bound=FindBoundStratumForChunk(ChunkZ);
+                if(Bound&&Bound->Resolved
+                    &&(Bound->Resolved->generatorKind=="FloatingIslands"
+                        ||Bound->Resolved->generatorKind=="VerticalShafts"))
+                    bStratumSlicingExpectedToPay=true;
                 if(Bound&&Bound->Kind==FBoundStratumField::EKind::SurfaceWorld)
                 {
+                    bLegacyFieldCandidate=false;
                     bSurfaceOverlap=true;bIslandOtherStrateOverlap=true;
                     const auto* Candidate=Bound->SurfacePlan;
                     if(!Candidate||ChunkZ<Candidate->bottomChunkZ
@@ -6016,9 +6235,14 @@ public:
                     IslandPlan=Candidate;
                     IslandField=std::get_if<FFloatingIslandFieldAdapter>(
                         &Bound->Evaluator);
+                    if(Bound->IslandPlan)bLegacyFieldCandidate=false;
+                    else if(Bound->Resolved
+                        &&Bound->Resolved->generatorKind=="TunnelNetwork")
+                        bLegacyBlockProofRelevant=true;
                 }
                 else if(Bound&&Bound->Kind==FBoundStratumField::EKind::Caves)
                 {
+                    bLegacyFieldCandidate=false;
                     bCavesOverlap=true;bOtherStrateOverlap=true;
                     bIslandOtherStrateOverlap=true;
                     if(CaveBound&&CaveBound!=Bound)bBadPlan=true;
@@ -6030,11 +6254,21 @@ public:
                         ||!std::get_if<FCavesFieldAdapter>(&Bound->Evaluator))bBadPlan=true;
                 }
                 else
-                {bOtherStrateOverlap=true;bIslandOtherStrateOverlap=true;bLegacyOverlap=true;}
+                {
+                    if(!Bound){bLegacyFieldCandidate=false;bMissingStratumBound=true;}
+                    else if(Bound->Resolved
+                        &&Bound->Resolved->generatorKind=="TunnelNetwork")
+                        bLegacyBlockProofRelevant=true;
+                    bOtherStrateOverlap=true;bIslandOtherStrateOverlap=true;bLegacyOverlap=true;
+                }
             }
             bCaveOtherStrateOverlap=bCavesOverlap
                 &&(bSurfaceOverlap||bIslandOverlap||bLegacyOverlap);
         }
+        if(bTraceTnBlock)
+            std::printf("[L75TNProofTrace] phase=field_bounds legacy=%d island=%d surface=%d caves=%d missing=%d bad_plan=%d\n",
+                bLegacyFieldCandidate?1:0,bIslandOverlap?1:0,bSurfaceOverlap?1:0,
+                bCavesOverlap?1:0,bMissingStratumBound?1:0,bBadPlan?1:0);
         const auto Finish=[&](EVoxelTileClass Verdict,bool bUnknown=false,
                               bool bLegacyAnalyticProof=false)
         {
@@ -6045,6 +6279,10 @@ public:
                 ||Verdict==EVoxelTileClass::AllSolid;
             FBoxClassification Result{Verdict,bNative,bUnknown,
                 bLegacyAnalyticProof||(bNative&&!bUnknown&&bUniform)};
+            Result.bLegacyFieldCandidate=bLegacyFieldCandidate;
+            Result.bLegacyBlockProofRelevant=bLegacyBlockProofRelevant;
+            Result.LegacyProofVeto=Result.bSkipSafe
+                ?static_cast<std::uint8_t>(ELegacyProofVeto::None):LegacyProofVeto;
             auto& Counts=ThreadClassificationStats();
             Counts.Milliseconds+=std::chrono::duration<double,std::milli>(Clock::now()-Start).count();
             if(bUnknown)++Counts.UnknownBoxes;
@@ -6053,6 +6291,73 @@ public:
             else ++Counts.MixedBoxes;
             return Result;
         };
+        if(SampleStep<=2&&bStratumSlicingExpectedToPay&&Owner&&ResolvedLayout
+            &&SampleStep>0&&BMax[2]>=BMin[2]
+            &&(static_cast<std::int64_t>(BMax[2])-BMin[2])%SampleStep==0)
+        {
+            const double LayoutWidth=GetResolvedLayoutChunkWidthVoxels();
+            if(LayoutWidth>0.0&&std::isfinite(LayoutWidth))
+            {
+                std::vector<std::pair<int32,int32>> StratumSlices;
+                int32 SliceStart=BMin[2];
+                auto BoundAt=[&](int32 Z)
+                {
+                    const int32 ChunkZ=FMath::FloorToInt(static_cast<float>(Z)/LayoutWidth);
+                    return FindBoundStratumForChunk(ChunkZ);
+                };
+                const FBoundStratumField* PreviousBound=BoundAt(SliceStart);
+                for(std::int64_t Z=static_cast<std::int64_t>(BMin[2])+SampleStep;
+                    Z<=BMax[2];Z+=SampleStep)
+                {
+                    const auto* Bound=BoundAt(static_cast<int32>(Z));
+                    if(Bound==PreviousBound)continue;
+                    StratumSlices.push_back({SliceStart,static_cast<int32>(Z-SampleStep)});
+                    SliceStart=static_cast<int32>(Z);
+                    PreviousBound=Bound;
+                }
+                if(!StratumSlices.empty())
+                {
+                    StratumSlices.push_back({SliceStart,BMax[2]});
+                    EVoxelTileClass CommonVerdict=EVoxelTileClass::Mixed;
+                    bool bHaveVerdict=false,bAllNative=true,bAllLegacy=true,bAnyLegacy=false;
+                    for(const auto& Slice:StratumSlices)
+                    {
+                        const int32 SliceMinimum[3]={BMin[0],BMin[1],Slice.first};
+                        const int32 SliceMaximum[3]={BMax[0],BMax[1],Slice.second};
+                        const auto Part=ClassifyBoundsDetailed(SliceMinimum,SliceMaximum,
+                            SampleStep,bUseNativeLatticeProof);
+                        if(!Part.bSkipSafe||Part.bUnknown
+                            ||(Part.Verdict!=EVoxelTileClass::AllSolid
+                                &&Part.Verdict!=EVoxelTileClass::AllAir))
+                        {
+                            LegacyProofVeto=Part.LegacyProofVeto
+                                ?Part.LegacyProofVeto
+                                :static_cast<std::uint8_t>(ELegacyProofVeto::StratumCrossing);
+                            return Finish(EVoxelTileClass::Mixed,Part.bUnknown);
+                        }
+                        if(!bHaveVerdict)
+                        {
+                            CommonVerdict=Part.Verdict;
+                            bHaveVerdict=true;
+                        }
+                        else if(Part.Verdict!=CommonVerdict)
+                        {
+                            LegacyProofVeto=static_cast<std::uint8_t>(
+                                ELegacyProofVeto::StratumCrossing);
+                            return Finish(EVoxelTileClass::Mixed);
+                        }
+                        bAllNative=bAllNative&&Part.bNativeSurface;
+                        bAllLegacy=bAllLegacy&&Part.bLegacyFieldCandidate;
+                        bAnyLegacy=bAnyLegacy||Part.bLegacyBlockProofRelevant;
+                    }
+                    auto Result=Finish(CommonVerdict,false,true);
+                    Result.bNativeSurface=bAllNative;
+                    Result.bLegacyFieldCandidate=bAllLegacy;
+                    Result.bLegacyBlockProofRelevant=bAnyLegacy;
+                    return Result;
+                }
+            }
+        }
         std::vector<std::uint32_t> stampCandidates;
         if(!StampSpatialBounds.empty())
         {
@@ -6075,7 +6380,10 @@ public:
                     &&stamp.record->kind
                         !=VoxelForgeCore::ResolvedSdfStampKindV1::fillPlatform)
                     ||!SurfacePlan||stamp.record->strateIndex!=SurfacePlan->strateIndex)
+                {
+                    LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::ComposerCandidate);
                     return Finish(EVoxelTileClass::Mixed,true);
+                }
             }
         }
         if(!CavernRuntime.empty())
@@ -6091,10 +6399,19 @@ public:
                 static_cast<std::int64_t>(BMax[2])*Q};
             caveCandidates=BuildCavernFeatureTileList(minimum,maximum);
             if(!caveCandidates.empty()&&!bCavesOverlap&&!bL74TightNegativeControl)
+            {
+                LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::ComposerCandidate);
                 return Finish(EVoxelTileClass::Mixed,true);
+            }
         }
-        if(ResolvedPassageIntersectsBox(BMin,BMax))
+        const bool bPassageOverlap=ResolvedPassageIntersectsBox(BMin,BMax);
+        if(bTraceTnBlock)
+            std::printf("[L75TNProofTrace] phase=passage intersects=%d\n",bPassageOverlap?1:0);
+        if(bPassageOverlap)
+        {
+            LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::PassageBounds);
             return Finish(EVoxelTileClass::Mixed,true);
+        }
         if(!EditBrushes.empty()&&EditBoundsMin.X<=BMax[0]&&EditBoundsMax.X>=BMin[0]
             &&EditBoundsMin.Y<=BMax[1]&&EditBoundsMax.Y>=BMin[1]
             &&EditBoundsMin.Z<=BMax[2]&&EditBoundsMax.Z>=BMin[2])
@@ -6111,6 +6428,7 @@ public:
                         if(ZMinMicrometres>=Band->bottomMicrometres
                             &&ZMaxMicrometres<Band->topMicrometres)
                             return Finish(EVoxelTileClass::AllSolid);
+                        LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::StratumCrossing);
                         return Finish(EVoxelTileClass::Mixed);
                     }
         }
@@ -6151,7 +6469,10 @@ public:
                     Lower->ceiling.topMicrometres)+MaximumDisplacement;
                 if(ZMaximumMicrometres>=WindowMinimum
                     &&ZMinimumMicrometres<=WindowMaximum)
+                {
+                    LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::Transition);
                     return Finish(EVoxelTileClass::Mixed,true);
+                }
             }
         }
         const auto TryLegacyAnalyticProof=[&]() -> std::optional<EVoxelTileClass>
@@ -6161,28 +6482,45 @@ public:
             // terms. SurfaceWorld op stacks, native adapters, and any active composer
             // feature fail closed and keep using their existing path.
             if(!WorldAssembly||!Owner||!Owner->Manager
-                ||!ResolvedLayout||!Owner->Generator||bSurfaceOverlap||bCavesOverlap
-                ||(!bL74TightNegativeControl
-                    &&(!stampCandidates.empty()||!caveCandidates.empty()))
-                ||!EditBrushes.empty()||LayerRanges.empty()
-                ||ActiveSpatialBinSize<=0)return std::nullopt;
-            const double LayoutWidth=GetResolvedLayoutChunkWidthVoxels();
-            if(!(LayoutWidth>0.0)||!std::isfinite(LayoutWidth))return std::nullopt;
-            const int32 FirstChunk=FMath::FloorToInt(static_cast<float>(BMin[2])/LayoutWidth);
-            const int32 LastChunk=FMath::FloorToInt(static_cast<float>(BMax[2])/LayoutWidth);
-            for(int32 ChunkZ=FirstChunk;ChunkZ<=LastChunk;++ChunkZ)
+                ||!ResolvedLayout||!Owner->Generator)
             {
-                const FBoundStratumField* Bound=FindBoundStratumForChunk(ChunkZ);
-                if(!Bound||Bound->Kind==FBoundStratumField::EKind::SurfaceWorld)
-                    return std::nullopt;
-                if(Bound->Kind==FBoundStratumField::EKind::FloatingIslands)
-                {
-                    // A missing FI plan is the owner's compiled-analytic fallback. Any
-                    // installed plan selects the native FI field and is outside this proof.
-                    if(Bound->IslandPlan)return std::nullopt;
-                }
-                if(Bound->Kind==FBoundStratumField::EKind::Caves)return std::nullopt;
+                LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::Other);
+                return std::nullopt;
             }
+            if(!stampCandidates.empty()||!caveCandidates.empty())
+            {
+                LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::ComposerCandidate);
+                if(!bL74TightNegativeControl)return std::nullopt;
+            }
+            if(bSurfaceOverlap||bCavesOverlap)
+            {
+                const bool bCrossedFieldKinds=(bSurfaceOverlap
+                    &&(bIslandOverlap||bCavesOverlap||bLegacyOverlap))
+                    ||(bIslandOverlap&&(bSurfaceOverlap||bCavesOverlap||bLegacyOverlap))
+                    ||(bCavesOverlap&&(bSurfaceOverlap||bIslandOverlap||bLegacyOverlap));
+                LegacyProofVeto=static_cast<std::uint8_t>(bCrossedFieldKinds||bBadPlan
+                    ?ELegacyProofVeto::StratumCrossing:ELegacyProofVeto::Other);
+                return std::nullopt;
+            }
+            if(!bLegacyFieldCandidate)
+            {
+                LegacyProofVeto=static_cast<std::uint8_t>(bBadPlan||bMissingStratumBound
+                    ?ELegacyProofVeto::StratumCrossing:ELegacyProofVeto::Other);
+                return std::nullopt;
+            }
+            if(!EditBrushes.empty()||LayerRanges.empty()||ActiveSpatialBinSize<=0)
+            {
+                LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::Other);
+                return std::nullopt;
+            }
+            const double LayoutWidth=GetResolvedLayoutChunkWidthVoxels();
+            if(!(LayoutWidth>0.0)||!std::isfinite(LayoutWidth))
+            {
+                LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::Other);
+                return std::nullopt;
+            }
+            // The earlier chunk scan establishes that this padded box selects only the
+            // compiled legacy field. Native fields and missing chunk bounds stay fail-closed.
             for(int32 BZ=FloorDiv(BMin[2],ActiveSpatialBinSize);
                 BZ<=FloorDiv(BMax[2],ActiveSpatialBinSize);++BZ)
             for(int32 BY=FloorDiv(BMin[1],ActiveSpatialBinSize);
@@ -6200,12 +6538,43 @@ public:
                         Overlap=Overlap
                             &&Primitive.Max[Axis]+DetailBand>=BMin[Axis]
                             &&Primitive.Min[Axis]-DetailBand<=BMax[Axis];
-                    if(Overlap&&!bL74TightNegativeControl)return std::nullopt;
+                    if(bTraceTnBlock&&Overlap)
+                        std::printf("[L75TNProofTrace] phase=primitive_overlap id=%u bounds=(%d,%d,%d)..(%d,%d,%d)\n",
+                            Id,Primitive.Min[0],Primitive.Min[1],Primitive.Min[2],
+                            Primitive.Max[0],Primitive.Max[1],Primitive.Max[2]);
+                    if(Overlap&&!bL74TightNegativeControl)
+                    {
+                        LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::PrimitiveOverlap);
+                        return std::nullopt;
+                    }
+                }
+            }
+            for(const uint32 Id:UnbinnedSpatialPrimitiveIds)
+            {
+                if(Id>=Primitives.size())continue;
+                const FPrimitive& Primitive=Primitives[Id];
+                bool Overlap=true;
+                for(int32 Axis=0;Axis<3;++Axis)
+                    Overlap=Overlap
+                        &&Primitive.Max[Axis]+DetailBand>=BMin[Axis]
+                        &&Primitive.Min[Axis]-DetailBand<=BMax[Axis];
+                if(bTraceTnBlock&&Overlap)
+                    std::printf("[L75TNProofTrace] phase=unbinned_primitive_overlap id=%u bounds=(%d,%d,%d)..(%d,%d,%d)\n",
+                        Id,Primitive.Min[0],Primitive.Min[1],Primitive.Min[2],
+                        Primitive.Max[0],Primitive.Max[1],Primitive.Max[2]);
+                if(Overlap&&!bL74TightNegativeControl)
+                {
+                    LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::PrimitiveOverlap);
+                    return std::nullopt;
                 }
             }
 
             const FInterval& Layer=LayerRanges.front();
-            if(Layer.Hi<=Layer.Lo)return std::nullopt;
+            if(Layer.Hi<=Layer.Lo)
+            {
+                LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::Other);
+                return std::nullopt;
+            }
             const auto BaseAt=[&](double Z)
             {return std::min(Z-static_cast<double>(Layer.Lo),
                 static_cast<double>(Layer.Hi)-Z);};
@@ -6217,19 +6586,29 @@ public:
             const double Peak=(static_cast<double>(Layer.Lo)+Layer.Hi)*0.5;
             if(Peak>=Z0&&Peak<=Z1)BaseMaximum=std::max(BaseMaximum,BaseAt(Peak));
             // With no active primitive, smooth-min sees only its +100000 sentinel;
-            // its largest possible downward correction is 12/6 = 2 voxels. Keep
-            // the entire resulting field outside the measured detail support (4.125).
+            // outside the width-12 transition it is exactly the base field. Charge its
+            // 12/6 maximum only if the base interval can approach that sentinel.
             constexpr double DetailSupport=DetailSupremum+0.125;
-            constexpr double SmoothMinSlack=StrataCaveBlendRadius/6.0;
+            constexpr double SmoothMinSentinel=100000.0;
+            const double SmoothMinSlack=BaseMaximum>SmoothMinSentinel
+                -StrataCaveBlendRadius?StrataCaveBlendRadius/6.0:0.0;
             constexpr double SafetyEpsilon=1.0e-3;
             const double SolidMargin=bL74TightNegativeControl
                 ?SafetyEpsilon:DetailSupport+SmoothMinSlack+SafetyEpsilon;
             const double AirMargin=bL74TightNegativeControl
                 ?SafetyEpsilon:DetailSupport+SafetyEpsilon;
+            if(bTraceTnBlock)
+                std::printf("[L75TNProofTrace] phase=legacy_interval base_min=%.9f base_max=%.9f detail=%.9f smooth_slack=%.9f solid_margin=%.9f air_margin=%.9f\n",
+                    BaseMinimum,BaseMaximum,DetailSupport,SmoothMinSlack,SolidMargin,AirMargin);
             if(BaseMinimum>SolidMargin)
                 return EVoxelTileClass::AllSolid;
             if(BaseMaximum<-AirMargin)
                 return EVoxelTileClass::AllAir;
+            if(!bL74TightNegativeControl&&SmoothMinSlack>0.0
+                &&BaseMinimum>DetailSupport+SafetyEpsilon)
+                LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::SmoothMinSlack);
+            else
+                LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::DetailEnvelope);
             return std::nullopt;
         };
         if(const auto LegacyVerdict=TryLegacyAnalyticProof())
@@ -6239,7 +6618,10 @@ public:
         if(bBadPlan||(bSurfaceOverlap&&(bIslandOverlap||bOtherStrateOverlap))
             ||(bIslandOverlap&&bIslandOtherStrateOverlap)
             ||(bCavesOverlap&&(bCaveOtherStrateOverlap||bSurfaceOverlap||bIslandOverlap)))
+        {
+            LegacyProofVeto=static_cast<std::uint8_t>(ELegacyProofVeto::StratumCrossing);
             return Finish(EVoxelTileClass::Mixed,true);
+        }
         // The native interval path below is the exact field selected first by DensityAtLattice
         // for SurfaceWorld and FloatingIslands. Legacy analytic primitives/layer bounds cannot
         // modify that field; only the explicit edit transaction above can. Keep their guards on
@@ -6317,7 +6699,7 @@ public:
                 static_cast<int64>(BMax[0])*VoxelForgeCore::WorldAssemblySubvoxelsPerVoxel,
                 static_cast<int64>(BMax[1])*VoxelForgeCore::WorldAssemblySubvoxelsPerVoxel,
                 static_cast<int64>(BMax[2])*VoxelForgeCore::WorldAssemblySubvoxelsPerVoxel,
-                std::max(Step,1));
+                std::max(SampleStep,1));
             switch(Verdict)
             {
                 case VoxelForgeCore::HeightfieldBoxClass::allAir:
@@ -9217,7 +9599,14 @@ private:
                 // primitive from analytic queries outside the packed near region.
                 // Les longues galeries diagonales ont une grande AABB mais un tube fin.
                 // Echantillonner l'axe avec une marge prudente garde les requetes analytiques.
-                if(!P.bCapsule)continue;
+                if(!P.bCapsule)
+                {
+                    // Large non-capsule bounds are deliberately omitted from point-query bins,
+                    // but interval proofs still need a complete candidate set. Keep these IDs
+                    // separate so block and tile proofs cannot mistake an omitted carve for air-free rock.
+                    UnbinnedSpatialPrimitiveIds.push_back(Id);
+                    continue;
+                }
                 const double BinWidth=static_cast<double>(BinResolution);
                 const double AxisStep=std::max(1.0,BinWidth*0.5);
                 const int32 AxisSamples=std::max(1,static_cast<int32>(std::ceil(
@@ -9269,6 +9658,9 @@ private:
                 if(bCriticalAir)CriticalAirBins[Key].push_back(Id);
             }
         }
+        std::sort(UnbinnedSpatialPrimitiveIds.begin(),UnbinnedSpatialPrimitiveIds.end());
+        UnbinnedSpatialPrimitiveIds.erase(std::unique(UnbinnedSpatialPrimitiveIds.begin(),
+            UnbinnedSpatialPrimitiveIds.end()),UnbinnedSpatialPrimitiveIds.end());
     }
 
     void BuildFarParentShapes()
@@ -11460,6 +11852,7 @@ private:
     std::vector<FStandalonePassageVoidCrossing> PassageVoidCrossings;
     std::array<FAxisBins,3> AxisBins;
     std::unordered_map<FBinKey,FBinItems,FBinHash> SpatialBins;
+    std::vector<uint32> UnbinnedSpatialPrimitiveIds;
     std::unordered_map<FBinKey,FBinItems,FBinHash> CriticalAirBins;
     mutable std::mutex FarFieldGpuInputMutex;
     mutable std::shared_ptr<const VoxelForgeCore::FarFieldWorldInput> CachedFarFieldGpuInput;

Standalone/Core/src/VoxelForgeCore.cpp

@@ -2364,6 +2364,10 @@ namespace VoxelForgeCore
             const double columnMillisecondsBeforeClassification=
                 VoxelForgeCore::Heightfield2D::threadColumnCacheStats().columnComputeMilliseconds;
             const auto Classification=tileShape.ClassifyBoxDetailed(origin,step,cells);
+            out.diagnostics.tileProofVetoReason=Classification.LegacyProofVeto;
+            out.diagnostics.tileProofSafe=Classification.bSkipSafe;
+            out.diagnostics.tileLegacyBlockProofRelevant=
+                Classification.bLegacyBlockProofRelevant;
             classificationColumnComputeMilliseconds=std::max(0.0,
                 VoxelForgeCore::Heightfield2D::threadColumnCacheStats().columnComputeMilliseconds
                     -columnMillisecondsBeforeClassification);
@@ -2443,11 +2447,10 @@ namespace VoxelForgeCore
                     return out;
                 }
             }
-            // Keep sub-tile early-outs on native fields whose block interval is complete.
-            // The legacy compiled field has sparse tunnel/composer terms that can change a
-            // small block without making the current whole-tile bound fail; leave those blocks
-            // to the exact grid and use only the separately falsified whole-tile proof above.
-            if(bHasWorldAssembly&&step<=2&&bNativeSurfaceTile)
+            // Preserve the committed native-field block path. Legacy block certificates
+            // remain audit-only until their cost is repaid against the full-grid path.
+            if(bHasWorldAssembly&&step<=2
+                &&(bNativeSurfaceTile||options.auditUniformBlockProofs))
                 mesher.bUseBlockEarlyOut=true;
         }
         const auto MeshingStart=std::chrono::steady_clock::now();
@@ -3077,13 +3080,15 @@ namespace VoxelForgeCore
                 /10000.0;
             const int32 stratum=world.Manager
                 ?world.Manager->GetStrateIndex(static_cast<float>(centerZ)):-1;
-            std::printf("[UniformGridCeiling] strate=%d lod=%d key=(%d,%d,%d) samples=%zu uniform=%d air=%d blocks8=%llu samples8=%llu blocks4=%llu samples4=%llu\n",
+            std::printf("[UniformGridCeiling] strate=%d lod=%d key=(%d,%d,%d) samples=%zu uniform=%d air=%d blocks8=%llu samples8=%llu blocks4=%llu samples4=%llu proof_safe=%d proof_veto=%u\n",
                 stratum,key.lod,key.coordinate.x,key.coordinate.y,key.coordinate.z,values.size(),
                 tileUniform&&tileHasSign?1:0,tileUniform&&tileHasSign&&tileAir?1:0,
                 static_cast<unsigned long long>(uniformBlocks8),
                 static_cast<unsigned long long>(uniformSamples8),
                 static_cast<unsigned long long>(uniformBlocks4),
-                static_cast<unsigned long long>(uniformSamples4));
+                static_cast<unsigned long long>(uniformSamples4),
+                out.diagnostics.tileProofSafe?1:0,
+                static_cast<unsigned>(out.diagnostics.tileProofVetoReason));
             out.densityHash=densityHash;out.meshHash=HashViewerMesh(mesh);
             out.payloadHash=HashPayload(mesh);out.topologyHash=HashTopology(mesh);
             out.materialHash=HashMaterialSamples(out.vertices);

Standalone/Research/WorldAssemblerM3/Linux75/FalsifierL75.py

@@ -0,0 +1,171 @@
+#!/usr/bin/env python3
+"""Compare full-grid and proof-skip mesh hashes for all four owner arrivals."""
+from __future__ import annotations
+
+import argparse
+import json
+import re
+import subprocess
+import time
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[4]
+OUT = ROOT / "Saved/Linux/l75/logs"
+DATA = ROOT / "Standalone/data/owner_world.json"
+BINS = {
+    "clang": ROOT / "Saved/Linux/l75/bin/VoxelForgeCoreHeadless-l75-clang",
+    "gcc": ROOT / "Saved/Linux/l75/bin-gcc/VoxelForgeCoreHeadless-l75-gcc",
+}
+CAMERAS = {
+    0: (8.0, 16.0, -372.2626953125),
+    1: (25.8369140625, 3.19921875, -737.0),
+    2: (19.166015625, -14.2001953125, -753.3740234375),
+    3: (-20.0625, -5.068359375, -900.353515625),
+}
+HASH_ROW = re.compile(
+    r"\[PipelineTileHash\] lod=(\d+) x=(-?\d+) y=(-?\d+) z=(-?\d+) "
+    r"density=(0x[0-9a-fA-F]+) mesh=(0x[0-9a-fA-F]+) "
+    r"payload=(0x[0-9a-fA-F]+) topology=(0x[0-9a-fA-F]+)"
+)
+EMPTY_DENSITY_HASH = "0xcbf29ce484222325"
+
+
+def read_hashes(path: Path) -> tuple[dict, set[tuple[int, int, int, int]]]:
+    hashes = {}
+    generated_density = set()
+    for line in path.read_text(encoding="utf-8", errors="replace").splitlines():
+        row = HASH_ROW.search(line)
+        if row:
+            lod, x, y, z = (int(row.group(i)) for i in range(1, 5))
+            hashes[(lod, x, y, z)] = {
+                "density": row.group(5).lower(), "mesh": row.group(6).lower(),
+                "payload": row.group(7).lower(), "topology": row.group(8).lower(),
+            }
+            if row.group(5).lower() != EMPTY_DENSITY_HASH:
+                generated_density.add((lod, x, y, z))
+    return hashes, generated_density
+
+
+def run(compiler: str, view: int, workers: int, allow_skips: bool,
+        negative_control: bool = False) -> Path:
+    camera = ",".join(f"{value:.12f}" for value in CAMERAS[view]) + ",0,0"
+    mode = "negative" if negative_control else "skip" if allow_skips else "reference"
+    log = OUT / f"{mode}-{compiler}-view{view}-w{workers}.log"
+    command = [
+        "taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--",
+        "timeout", "1740s", str(BINS[compiler]), str(DATA),
+        "--world-assembler-prototype", "--stream-benchmark", "--stream-pipeline",
+        "--force-generate", f"--workers={workers}", "--clip-radius=3",
+        "--max-clip-level=8", "--max-level=8", f"--camera={camera}",
+        "--stream-hash-tiles-allow-skips" if allow_skips or negative_control
+        else "--stream-hash-tiles",
+    ]
+    import os
+    environment = os.environ.copy()
+    if negative_control:
+        environment["VOXELFORGE_L74_TIGHT_PROOF_CONTROL"] = "1"
+    started = time.monotonic()
+    with log.open("w", encoding="utf-8") as output:
+        result = subprocess.run(command, cwd=ROOT, env=environment, stdout=output,
+                                stderr=subprocess.STDOUT, check=False, timeout=1740)
+    hashes, _ = read_hashes(log)
+    print(json.dumps({"compiler": compiler, "view": view, "workers": workers,
+                      "mode": mode, "exit_code": result.returncode,
+                      "hash_rows": len(hashes), "wall_s": round(time.monotonic()-started, 3),
+                      "log": str(log.relative_to(ROOT))}, sort_keys=True), flush=True)
+    if result.returncode != 0 or not hashes:
+        raise SystemExit(f"hash generation failed; see {log}")
+    return log
+
+
+def compare(reference: Path, candidate: Path) -> dict:
+    reference_hashes, _ = read_hashes(reference)
+    candidate_hashes, candidate_generated = read_hashes(candidate)
+    missing = sorted(reference_hashes.keys() - candidate_hashes.keys())
+    extra = sorted(candidate_hashes.keys() - reference_hashes.keys())
+    mismatch_counts = {field: 0 for field in ("mesh", "payload", "topology", "density_processed")}
+    mismatch_examples = []
+    for key in sorted(reference_hashes.keys() & candidate_hashes.keys()):
+        a, b = reference_hashes[key], candidate_hashes[key]
+        fields = ["mesh", "payload", "topology"]
+        if key in candidate_generated:
+            fields.append("density")
+        for field in fields:
+            if a[field] != b[field]:
+                label = "density_processed" if field == "density" else field
+                mismatch_counts[label] += 1
+                if len(mismatch_examples) < 8:
+                    mismatch_examples.append({"key": key, "field": field,
+                                              "reference": a[field], "candidate": b[field]})
+    return {"reference": str(reference.relative_to(ROOT)),
+            "candidate": str(candidate.relative_to(ROOT)),
+            "reference_tiles": len(reference_hashes), "candidate_tiles": len(candidate_hashes),
+            "missing_keys": missing[:8], "missing_key_count": len(missing),
+            "extra_keys": extra[:8], "extra_key_count": len(extra),
+            "mismatch_counts": mismatch_counts, "mismatch_examples": mismatch_examples,
+            "mesh_topology_equal": not missing and not extra
+                and mismatch_counts["mesh"] == 0 and mismatch_counts["topology"] == 0}
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--phase", choices=("matrix", "workers", "negative"), required=True)
+    args = parser.parse_args()
+    OUT.mkdir(parents=True, exist_ok=True)
+    missing = [str(path) for path in [DATA, *BINS.values()] if not path.is_file()]
+    if missing:
+        raise SystemExit("missing input: " + ", ".join(missing))
+    comparisons = []
+    if args.phase == "matrix":
+        references = {}
+        skip_eight = {}
+        for compiler in ("clang", "gcc"):
+            for view in range(4):
+                reference = run(compiler, view, 8, False)
+                skip = run(compiler, view, 8, True)
+                references[(compiler, view)] = reference
+                skip_eight[(compiler, view)] = skip
+                comparisons.append(compare(reference, skip))
+        for view in range(4):
+            comparisons.append(compare(references[("clang", view)],
+                                      references[("gcc", view)]))
+            comparisons.append(compare(skip_eight[("clang", view)],
+                                      skip_eight[("gcc", view)]))
+        (OUT / "falsifier-matrix.json").write_text(json.dumps(comparisons, indent=2)+"\n",
+                                                    encoding="utf-8")
+    elif args.phase == "workers":
+        for compiler in ("clang", "gcc"):
+            for view in range(4):
+                reference = OUT / f"reference-{compiler}-view{view}-w8.log"
+                if not reference.is_file():
+                    raise SystemExit(f"missing reference from matrix phase: {reference}")
+                baseline = OUT / f"skip-{compiler}-view{view}-w8.log"
+                for workers in (1, 12):
+                    candidate = run(compiler, view, workers, True)
+                    comparisons.append(compare(reference, candidate))
+                    comparisons.append(compare(baseline, candidate))
+        (OUT / "falsifier-workers.json").write_text(json.dumps(comparisons, indent=2)+"\n",
+                                                     encoding="utf-8")
+    else:
+        for view in range(4):
+            reference = OUT / f"reference-clang-view{view}-w8.log"
+            candidate = run("clang", view, 8, True, negative_control=True)
+            comparisons.append(compare(reference, candidate))
+        (OUT / "falsifier-negative-control.json").write_text(
+            json.dumps(comparisons, indent=2)+"\n", encoding="utf-8")
+        caught = any(not row["mesh_topology_equal"] for row in comparisons)
+        print(f"[L74NegativeControlResult] caught={int(caught)}", flush=True)
+        if not caught:
+            return 2
+        return 0
+    failures = [row for row in comparisons if not row["mesh_topology_equal"]
+                or row["missing_key_count"] or row["extra_key_count"]
+                or any(row["mismatch_counts"].values())]
+    print(f"[L74Falsifier] phase={args.phase} comparisons={len(comparisons)} "
+          f"mesh_topology_failures={len(failures)}", flush=True)
+    return 0 if not failures else 1
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

Standalone/Research/WorldAssemblerM3/Linux75/REPORT.md

@@ -0,0 +1,85 @@
+# L75 report
+
+## Whole-tile veto census
+
+Across 9,661 sampled tiles, 4,917 were uniform in the full-grid sample. The proof certified 3,093 (63% of those uniform tiles, 32% of all visits); 1,824 uniform tiles were vetoed.
+
+| First veto | Missed uniform tiles |
+|---|---:|
+| Detail envelope too wide | 0 |
+| Composer candidate | 0 |
+| Passage bounds | 289 |
+| Primitive overlap | 236 |
+| Transition | 141 |
+| Stratum crossing | 924 |
+| Smooth-min slack | 0 |
+| Other / native interval inconclusive | 234 |
+
+The 234 `other` cases are SW native interval queries that remain inconclusive. Per-stratum veto rows are in `Saved/Linux/l75/logs/veto-audit.json`.
+
+## Changes and sub-tile proof
+
+The dominant veto was stratum crossing. The classifier now slices its z interval at exact stratum boundaries and evaluates each slice; this reduced crossing vetoes from 1,354 to 924. Passage bounds now include the 0.21 m wall and 0.20 m floor relief, plus Catmull-Rom centerline extrema. The resulting bounds remain conservative; passage vetoes rose to 289 because the old bounds omitted real carve support.
+
+Sub-tile checks use a block-local legacy interval and the same detail, composer, passage, primitive, transition, stratum, and smooth-min vetoes. A certified block is skipped; an inconclusive block falls back to full density sampling. Runtime legacy checks are enabled for TN, where the regression was found; the audit override exercises them in all four views.
+
+The permanent TN regression is at `(-80,-20,-3218)`: density is `+0.0633840263` (air). The failed proofs bounded the nominal passage route but missed its wall/floor relief, which extends the carve outside that bound. All four containing blocks now classify mixed and sample the point. See `Saved/Linux/l75/logs/tn-block-regression.log`.
+
+## Falsification and timing
+
+Clang/GCC full-grid versus skip comparisons matched mesh, payload, and topology hashes on every tile in all four views. W1/W8/W12 comparisons also had zero mismatches. The deliberately too-tight negative control was caught in all four views. The 20-position-per-view sweep completed 80/80 positions with zero block-proof violations; hit rates were SW 83.68%, FI 69.16%, TN 73.80%, VS 73.64%. The fast tier passed in 318.6 s.
+
+Three interleaved pairs per view compared the rebuilt `c67b200` baseline (source stamp `aacea94c`) with L75 (`ebc12def`). Whole-view medians:
+
+| View | Before | L75 | Change |
+|---|---:|---:|---:|
+| SW | 2.405 s | 2.510 s | +4.37% |
+| FI | 4.839 s | 5.351 s | +10.58% |
+| TN | 4.477 s | 4.976 s | +11.15% |
+| VS | 2.464 s | 3.187 s | +29.34% |
+
+The L75 proof work improved coverage but did not improve whole-view time. Full-detail unknown boxes rose from c67 to L75: SW 1,424→1,493, FI 9,391→15,636, TN 3,760→11,342, and VS 176→5,543. Further work should isolate the conservative primitive bounds and full-sampling fallbacks before claiming a speedup. Far LOD refinement was left unchanged.
+
+## Builds, source changes, and failed runs
+
+Clang 19 and GCC 14 builds passed at source stamp `ebc12def`. The fast tier passed. After timing, the requested `VFHostEditor` Linux Development build was launched with `-MaxParallelActions=4` and the required process limits. Bundled CoreCLR failed before UnrealBuildTool or C++ compilation with `GC heap initialization failed (0x8007000E)` / `Failed to create CoreCLR`; retrying with bounded .NET GC settings had the same failure. The UE compile is therefore unverified under the mandated 6 GiB address-space limit. Log: `Saved/Linux/l75/ue-build-driver.log`.
+
+No top-level Unreal module `Source/` files changed. The standalone source changes are `Standalone/Source/StreamingWorld.h` and `Standalone/Source/VoxelForge/Private/VoxelMarchingCubesMesher.cpp`. The cached L74 binary failed its owner-data preflight and was excluded; the timing baseline was rebuilt from `c67b200`. No final hash, sweep, negative-control, or fast-tier run failed.
+
+## Net subset (follow-up)
+
+Kept the corrected passage proof and TN regression. Passage support is now stored as four parameter-subinterval bounds per route segment. Each bound uses Catmull-Rom derivative extrema where smoothing can occur, otherwise linear endpoints, plus the local maximum radius and outward padding. The 0.21 m wall relief is included along the route; the 0.20 m floor relief is added only for upper-entry segments where that field can apply. The four proof boxes are a conservative union; runtime passage-feature bounds also use their union. The refreshed sampled-tile audit found 5,028 uniform tiles and 1,881 misses:
+
+| First veto | Missed uniform tiles |
+|---|---:|
+| Detail envelope | 0 |
+| Composer candidate | 0 |
+| Passage bounds | 313 |
+| Primitive overlap | 199 |
+| Transition | 0 |
+| Stratum crossing | 1,135 |
+| Smooth-min slack | 0 |
+| Other / native interval inconclusive | 234 |
+
+Sub-tile legacy block certificates are audit-only. The committed native block path remains enabled, with its full-grid fallback when any block candidate is uncertified. Stratum slicing is limited to LOD0–2 in FI and VS; SW and TN use the conservative crossing veto. The TN probe `(-80,-20,-3218)` remains air at `+0.0633840263`; all four covering blocks were Mixed/unknown, with zero violations across 62,261,518 audited samples.
+
+Final evidence passed on source stamp `17470bc8`:
+
+- Clang/GCC full-grid versus skip: 16 comparisons, exact mesh/payload/topology hashes on every tile; zero mismatches.
+- W1/W8/W12: 32 comparisons, zero mismatches.
+- Negative control: caught in all four views.
+- Sweep: 20 positions per view, 80/80 zero violations and exact tile hashes. Hit rates were SW 24.13%, FI 22.05%, TN 25.88%, VS 22.32%.
+- Fast tier: PASS, 318.9 s.
+
+Three interleaved whole-view pairs against rebuilt `c67b200`:
+
+| View | Before median | Net subset | Change |
+|---|---:|---:|---:|
+| SW | 2.441 s | 2.410 s | −1.27% |
+| FI | 4.975 s | 4.596 s | −7.62% |
+| TN | 4.569 s | 4.462 s | −2.34% |
+| VS | 2.479 s | 2.484 s | +0.20% |
+
+The UE `VFHostEditor` Linux Development build succeeded after timing, with `-MaxParallelActions=4` and no address-space limit (27/27 actions, 68.4 s). It emitted three `CreateSectionGroup` deprecation warnings at `VoxelWorld.cpp`. No top-level Unreal `Source/` files changed; the standalone `Source/` changes are `Standalone/Source/StreamingWorld.h` and `Standalone/Source/VoxelForge/Private/VoxelMarchingCubesMesher.cpp`.
+
+Failed experiments: the original L75 runtime legacy-block configuration and the mixed-parent native-block gate regressed whole-view timing, so they were dropped. The earlier UBT attempt under the 6 GiB address-space cap failed before C++ compilation because CoreCLR could not initialize; the authorized uncapped UBT build passed.

Standalone/Research/WorldAssemblerM3/Linux75/RunAuditSweepL75.py

@@ -0,0 +1,111 @@
+#!/usr/bin/env python3
+"""Audit certified legacy density blocks across 20 deterministic camera positions per stratum."""
+from __future__ import annotations
+
+import json
+import re
+import statistics
+import subprocess
+import time
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[4]
+OUT = ROOT / "Saved/Linux/l75/logs"
+DATA = ROOT / "Standalone/data/owner_world.json"
+BIN = ROOT / "Saved/Linux/l75/bin/VoxelForgeCoreHeadless-l75-clang"
+CAMERAS = {
+    0: (8.0, 16.0, -372.2626953125),
+    1: (25.8369140625, 3.19921875, -737.0),
+    2: (19.166015625, -14.2001953125, -753.3740234375),
+    3: (-20.0625, -5.068359375, -900.353515625),
+}
+OFFSETS = [(x, y) for y in (0.1, 4.1, 8.1, 12.1)
+           for x in (0.1, 4.1, 8.1, 12.1, 16.1)]
+AUDIT = re.compile(
+    r"\[UniformBlockProofAudit\] checked_blocks=(\d+) checked_samples=(\d+) "
+    r"fallback_blocks=(\d+) unknown_blocks=(\d+) violations=(\d+)"
+)
+TILE = re.compile(
+    r"\[WorldAssemblerTilePipeline\] .*?solid_boxes=(\d+) air_boxes=(\d+) "
+    r"mixed_boxes=(\d+) unknown_boxes=(\d+) whole_tile_skips=(\d+).*?"
+    r"classification_worker_ms=([0-9.]+)"
+)
+VIOLATION = re.compile(r"\[UniformBlockProofViolation\]")
+
+
+def run(view: int, position: int, offset: tuple[int, int]) -> dict:
+    base = CAMERAS[view]
+    camera = ",".join(f"{value:.12f}" for value in
+                       (base[0] + offset[0], base[1] + offset[1], base[2])) + ",0,0"
+    log = OUT / f"audit-s{view}-p{position:02d}.log"
+    command = [
+        "taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--", "timeout",
+        "1740s", str(BIN), str(DATA), "--world-assembler-prototype", "--stream-benchmark",
+        "--stream-pipeline", "--workers=8", "--clip-radius=3",
+        "--max-clip-level=8", "--max-level=8", f"--camera={camera}",
+        "--audit-uniform-block-proofs", "--profile-lod-work",
+    ]
+    started = time.monotonic()
+    with log.open("w", encoding="utf-8") as output:
+        result = subprocess.run(command, cwd=ROOT, stdout=output, stderr=subprocess.STDOUT,
+                                check=False, timeout=1740)
+    content = log.read_text(encoding="utf-8", errors="replace")
+    audit = AUDIT.search(content)
+    tile = TILE.search(content)
+    if result.returncode != 0 or audit is None or tile is None:
+        raise SystemExit(f"audit run failed or summary is missing; see {log}")
+    checked, samples, fallback, unknown, violations = map(int, audit.groups())
+    solid, air, mixed, tile_unknown, tile_skips = map(int, tile.groups()[:5])
+    classifier_ms = float(tile.group(6))
+    violation_lines = len(VIOLATION.findall(content))
+    row = {
+        "strate": view, "position": position, "offset_m": list(offset),
+        "exit_code": result.returncode, "wall_s": round(time.monotonic() - started, 3),
+        "checked_blocks": checked, "checked_samples": samples,
+        "fallback_blocks": fallback, "unknown_blocks": unknown,
+        "violations": violations + violation_lines,
+        "block_proof_hit_pct": round(100.0 * checked / max(checked + fallback, 1), 2),
+        "tile_solid_boxes": solid, "tile_air_boxes": air, "tile_mixed_boxes": mixed,
+        "tile_unknown_boxes": tile_unknown, "tile_whole_skips": tile_skips,
+        "classification_worker_ms": classifier_ms,
+        "log": str(log.relative_to(ROOT)),
+    }
+    print("[L75AuditSweepRun] " + json.dumps(row, sort_keys=True), flush=True)
+    if row["violations"] != 0:
+        raise SystemExit(f"uniform block proof violation; see {log}")
+    return row
+
+
+def main() -> int:
+    OUT.mkdir(parents=True, exist_ok=True)
+    if not DATA.is_file() or not BIN.is_file():
+        raise SystemExit("missing owner world or L75 Clang headless binary")
+    rows = [run(view, index, offset) for view in range(4)
+            for index, offset in enumerate(OFFSETS)]
+    summary = []
+    for view in range(4):
+        group = [row for row in rows if row["strate"] == view]
+        checked = sum(row["checked_blocks"] for row in group)
+        fallback = sum(row["fallback_blocks"] for row in group)
+        costs = [row["classification_worker_ms"] for row in group]
+        summary.append({
+            "strate": view, "positions": len(group), "violations": sum(
+                row["violations"] for row in group), "checked_blocks": checked,
+            "fallback_blocks": fallback, "proof_hit_pct": round(
+                100.0 * checked / max(checked + fallback, 1), 2),
+            "classifier_ms_p50": round(statistics.median(costs), 3),
+            "classifier_ms_p95": round(sorted(costs)[int(0.95 * (len(costs) - 1))], 3),
+        })
+    if any(row["checked_blocks"] == 0 for row in summary):
+        raise SystemExit("block interval audit did not check a proof block for every strate")
+    result = {"runs": rows, "summary": summary}
+    (OUT / "audit-sweep.json").write_text(json.dumps(result, indent=2) + "\n",
+                                          encoding="utf-8")
+    for row in summary:
+        print("[L75AuditSweepSummary] " + json.dumps(row, sort_keys=True), flush=True)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

Standalone/Research/WorldAssemblerM3/Linux75/RunHashSweepL75.py

@@ -0,0 +1,163 @@
+#!/usr/bin/env python3
+"""Exact full-grid versus whole-tile skip sweep at 20 camera positions per stratum."""
+from __future__ import annotations
+
+import json
+import re
+import statistics
+import subprocess
+import time
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[4]
+OUT = ROOT / "Saved/Linux/l75/logs"
+DATA = ROOT / "Standalone/data/owner_world.json"
+BIN = ROOT / "Saved/Linux/l75/bin/VoxelForgeCoreHeadless-l75-clang"
+CAMERAS = {
+    0: (8.0, 16.0, -372.2626953125),
+    1: (25.8369140625, 3.19921875, -737.0),
+    2: (19.166015625, -14.2001953125, -753.3740234375),
+    3: (-20.0625, -5.068359375, -900.353515625),
+}
+OFFSETS = [(x, y) for y in (0.1, 4.1, 8.1, 12.1)
+           for x in (0.1, 4.1, 8.1, 12.1, 16.1)]
+HASH = re.compile(
+    r"\[PipelineTileHash\] lod=(\d+) x=(-?\d+) y=(-?\d+) z=(-?\d+) "
+    r"density=(0x[0-9a-fA-F]+) mesh=(0x[0-9a-fA-F]+) "
+    r"payload=(0x[0-9a-fA-F]+) topology=(0x[0-9a-fA-F]+)"
+)
+EMPTY_DENSITY_HASH = "0xcbf29ce484222325"
+PIPELINE = re.compile(r"\[StreamPipeline\] (.*)")
+TILE_PIPELINE = re.compile(r"\[WorldAssemblerTilePipeline\] (.*)")
+PAIR = re.compile(r"([a-zA-Z0-9_]+)=([^ ]+)")
+
+
+def read_hashes(path: Path) -> tuple[dict, set[tuple[int, int, int, int]]]:
+    hashes = {}
+    generated = set()
+    for line in path.read_text(encoding="utf-8", errors="replace").splitlines():
+        match = HASH.search(line)
+        if match:
+            lod, x, y, z = (int(match.group(index)) for index in range(1, 5))
+            hashes[(lod, x, y, z)] = {
+                "density": match.group(5).lower(), "mesh": match.group(6).lower(),
+                "payload": match.group(7).lower(), "topology": match.group(8).lower(),
+            }
+            if match.group(5).lower() != EMPTY_DENSITY_HASH:
+                generated.add((lod, x, y, z))
+    return hashes, generated
+
+
+def parse_summary(path: Path) -> dict:
+    content = path.read_text(encoding="utf-8", errors="replace")
+    pipeline = PIPELINE.search(content)
+    tile_pipeline = TILE_PIPELINE.search(content)
+    if pipeline is None or tile_pipeline is None:
+        raise SystemExit(f"pipeline summaries missing; see {path}")
+    values = dict(PAIR.findall(pipeline.group(1)))
+    tile_values = dict(PAIR.findall(tile_pipeline.group(1)))
+    tiles = values.get("whole_tiles", "0/0").split("/")
+    return {
+        "tiles": int(tiles[1]) if len(tiles) == 2 else 0,
+        "whole_tile_skips": int(tile_values.get("whole_tile_skips", "0")),
+        "classification_worker_ms": float(tile_values.get("classification_worker_ms", "0")),
+    }
+
+
+def run(mode: str, view: int, position: int, offset: tuple[float, float]) -> dict:
+    base = CAMERAS[view]
+    xyz = (base[0] + offset[0], base[1] + offset[1], base[2])
+    camera = ",".join(f"{value:.12f}" for value in xyz) + ",0,0"
+    log = OUT / f"sweep-{mode}-s{view}-p{position:02d}.log"
+    hash_flag = "--stream-hash-tiles" if mode == "reference" \
+        else "--stream-hash-tiles-allow-skips"
+    command = [
+        "taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--", "timeout",
+        "1740s", str(BIN), str(DATA), "--world-assembler-prototype", "--stream-benchmark",
+        "--stream-pipeline", "--force-generate", "--workers=8", "--clip-radius=3",
+        "--max-clip-level=8", "--max-level=8", f"--camera={camera}", hash_flag,
+    ]
+    started = time.monotonic()
+    with log.open("w", encoding="utf-8") as output:
+        result = subprocess.run(command, cwd=ROOT, stdout=output, stderr=subprocess.STDOUT,
+                                check=False, timeout=1740)
+    hashes, _ = read_hashes(log)
+    if result.returncode != 0 or not hashes:
+        raise SystemExit(f"{mode} hash generation failed; see {log}")
+    summary = parse_summary(log)
+    row = {
+        "mode": mode, "strate": view, "position": position, "offset_m": list(offset),
+        "camera_m": list(xyz), "exit_code": result.returncode,
+        "wall_s": round(time.monotonic() - started, 3), "hash_rows": len(hashes),
+        **summary, "log": str(log.relative_to(ROOT)),
+    }
+    print("[L75HashSweepRun] " + json.dumps(row, sort_keys=True), flush=True)
+    return row
+
+
+def compare(reference: Path, candidate: Path) -> dict:
+    expected, _ = read_hashes(reference)
+    actual, candidate_generated = read_hashes(candidate)
+    missing = expected.keys() - actual.keys()
+    extra = actual.keys() - expected.keys()
+    mismatches = {field: 0 for field in ("mesh", "payload", "topology", "density_processed")}
+    for key in expected.keys() & actual.keys():
+        fields = ["mesh", "payload", "topology"]
+        if key in candidate_generated:
+            fields.append("density")
+        for field in fields:
+            if expected[key][field] != actual[key][field]:
+                mismatches["density_processed" if field == "density" else field] += 1
+    return {
+        "reference": str(reference.relative_to(ROOT)),
+        "candidate": str(candidate.relative_to(ROOT)),
+        "reference_tiles": len(expected), "candidate_tiles": len(actual),
+        "missing_keys": len(missing), "extra_keys": len(extra),
+        "mismatches": mismatches,
+        "equal": not missing and not extra and not any(mismatches.values()),
+    }
+
+
+def main() -> int:
+    if not DATA.is_file() or not BIN.is_file():
+        raise SystemExit("missing owner world or L75 Clang headless binary")
+    references, candidates, comparisons = [], [], []
+    for view in range(4):
+        for position, offset in enumerate(OFFSETS):
+            reference = run("reference", view, position, offset)
+            candidate = run("skip", view, position, offset)
+            comparison = compare(ROOT / reference["log"], ROOT / candidate["log"])
+            comparison.update(strate=view, position=position)
+            references.append(reference)
+            candidates.append(candidate)
+            comparisons.append(comparison)
+            print("[L75HashSweepCompare] " + json.dumps(comparison, sort_keys=True), flush=True)
+            if not comparison["equal"]:
+                raise SystemExit(f"whole-tile proof falsified; see {comparison['candidate']}")
+    summaries = []
+    for view in range(4):
+        rows = [row for row in candidates if row["strate"] == view]
+        skips = sum(row["whole_tile_skips"] for row in rows)
+        tiles = sum(row["tiles"] for row in rows)
+        costs = [row["classification_worker_ms"] for row in rows]
+        summaries.append({
+            "strate": view, "camera_positions": len(rows), "hash_comparisons": len(rows),
+            "violations": sum(not row["equal"] for row in comparisons
+                              if row["strate"] == view),
+            "whole_tile_proof_hits": skips, "tiles_visited": tiles,
+            "proof_hit_pct": round(100.0 * skips / max(tiles, 1), 2),
+            "classifier_ms_p50": round(statistics.median(costs), 3),
+            "classifier_ms_p95": round(sorted(costs)[int(0.95 * (len(costs) - 1))], 3),
+        })
+    result = {"runs": {"reference": references, "skip": candidates},
+              "comparisons": comparisons, "summary": summaries}
+    (OUT / "hash-sweep.json").write_text(json.dumps(result, indent=2) + "\n",
+                                         encoding="utf-8")
+    for row in summaries:
+        print("[L75HashSweepSummary] " + json.dumps(row, sort_keys=True), flush=True)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

Standalone/Research/WorldAssemblerM3/Linux75/RunTimingPairsL75.py

@@ -0,0 +1,96 @@
+#!/usr/bin/env python3
+"""Run three interleaved full-view pairs on committed L74 and current L75 builds."""
+from __future__ import annotations
+
+import json
+import re
+import statistics
+import subprocess
+import time
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[4]
+OUT = ROOT / "Saved/Linux/l75/logs/timing"
+DATA = ROOT / "Standalone/data/owner_world.json"
+BINARIES = {
+    "before": ROOT / "Saved/Linux/l75/bin-c67-before/VoxelForgeCoreHeadless-l74-clang19",
+    "after": ROOT / "Saved/Linux/l75/bin/VoxelForgeCoreHeadless-l75-clang",
+}
+CAMERAS = {
+    0: (8.0, 16.0, -372.2626953125),
+    1: (25.8369140625, 3.19921875, -737.0),
+    2: (19.166015625, -14.2001953125, -753.3740234375),
+    3: (-20.0625, -5.068359375, -900.353515625),
+}
+ORDERS = (("before", "after"), ("after", "before"), ("before", "after"))
+PIPELINE = re.compile(r"\[StreamPipeline\] (.*)")
+PAIR = re.compile(r"([a-zA-Z0-9_]+)=([^ ]+)")
+
+
+def run(strate: int, pair: int, mode: str) -> dict:
+    label = f"strate{strate}-pair{pair}-{mode}"
+    log = OUT / f"{label}.log"
+    camera = ",".join(f"{value:.12f}" for value in CAMERAS[strate]) + ",0,0"
+    command = [
+        "taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--", "timeout",
+        "1740s", str(BINARIES[mode]), str(DATA), "--world-assembler-prototype",
+        "--stream-benchmark", "--stream-pipeline", "--force-generate", "--workers=8",
+        "--clip-radius=3", "--max-clip-level=8", "--max-level=8", f"--camera={camera}",
+    ]
+    started = time.monotonic()
+    with log.open("w", encoding="utf-8") as output:
+        result = subprocess.run(command, cwd=ROOT, stdout=output, stderr=subprocess.STDOUT,
+                                check=False, timeout=1740)
+    content = log.read_text(encoding="utf-8", errors="replace")
+    match = PIPELINE.search(content)
+    if result.returncode != 0 or match is None:
+        raise SystemExit(f"timing run failed or missing StreamPipeline summary; see {log}")
+    pipeline = dict(PAIR.findall(match.group(1)))
+    row = {
+        "strate": strate, "pair": pair, "mode": mode, "exit_code": result.returncode,
+        "process_wall_s": round(time.monotonic() - started, 3),
+        "whole_view_ready_s": float(pipeline["whole_view_ready"].removesuffix("s")),
+        "stream_wall_s": float(pipeline["stream_wall"].removesuffix("s")),
+        "whole_tiles": int(pipeline["whole_tiles"].split("/")[0]),
+        "source_stamp": re.search(r"^\[VoxelForgeSourceStamp\] sha256=(\S+)$",
+                                  content, re.M),
+        "log": str(log.relative_to(ROOT)),
+    }
+    row["source_stamp"] = row["source_stamp"].group(1) if row["source_stamp"] else None
+    print("[L75TimingPairRun] " + json.dumps(row, sort_keys=True), flush=True)
+    return row
+
+
+def main() -> int:
+    OUT.mkdir(parents=True, exist_ok=True)
+    missing = [str(path) for path in [DATA, *BINARIES.values()] if not path.is_file()]
+    if missing:
+        raise SystemExit("missing input: " + ", ".join(missing))
+    rows = []
+    for strate in range(4):
+        for pair, order in enumerate(ORDERS, 1):
+            for mode in order:
+                rows.append(run(strate, pair, mode))
+    summary = []
+    for strate in range(4):
+        group = [row for row in rows if row["strate"] == strate]
+        before = [row["whole_view_ready_s"] for row in group if row["mode"] == "before"]
+        after = [row["whole_view_ready_s"] for row in group if row["mode"] == "after"]
+        summary.append({"strate": strate, "pairs": len(before),
+                        "before_s": [round(value, 3) for value in before],
+                        "after_s": [round(value, 3) for value in after],
+                        "before_median_s": round(statistics.median(before), 3),
+                        "after_median_s": round(statistics.median(after), 3),
+                        "change_pct": round(100.0 * (statistics.median(after)
+                            / statistics.median(before) - 1.0), 2)})
+    result = {"runs": rows, "summary": summary}
+    (OUT / "summary.json").write_text(json.dumps(result, indent=2) + "\n",
+                                      encoding="utf-8")
+    for row in summary:
+        print("[L75TimingPairSummary] " + json.dumps(row, sort_keys=True), flush=True)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

Standalone/Research/WorldAssemblerM3/Linux75/RunTnBlockRegressionL75.py

@@ -0,0 +1,85 @@
+#!/usr/bin/env python3
+"""Keep the L74 false-solid TN lattice sample under a permanent block audit."""
+from __future__ import annotations
+
+import json
+import os
+import re
+import subprocess
+import time
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[4]
+OUT = ROOT / "Saved/Linux/l75/logs"
+DATA = ROOT / "Standalone/data/owner_world.json"
+BIN = ROOT / "Saved/Linux/l75/bin/VoxelForgeCoreHeadless-l75-clang"
+PROBE = (-80, -20, -3218)
+EXPECTED_DENSITY = 0.063384
+CAMERA_METERS = (19.266015625, -14.1001953125, -753.3740234375)
+REGRESSION = re.compile(r"\[L75TNBlockRegression\] (.*)")
+AUDIT = re.compile(r"\[UniformBlockProofAudit\] checked_blocks=(\d+) checked_samples=(\d+) "
+                   r"fallback_blocks=(\d+) unknown_blocks=(\d+) violations=(\d+)")
+PAIR = re.compile(r"([a-zA-Z0-9_]+)=([^ ]+)")
+
+
+def main() -> int:
+    if not DATA.is_file() or not BIN.is_file():
+        raise SystemExit("missing owner world or L75 Clang headless binary")
+    OUT.mkdir(parents=True, exist_ok=True)
+    camera = ",".join(f"{value:.12f}" for value in CAMERA_METERS) + ",0,0"
+    log = OUT / "tn-block-regression.log"
+    command = [
+        "taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--", "timeout",
+        "1740s", str(BIN), str(DATA), "--world-assembler-prototype",
+        "--stream-benchmark", "--stream-pipeline", "--stream-hash-tiles",
+        "--audit-uniform-block-proofs", "--workers=8", "--clip-radius=3",
+        "--max-clip-level=8", "--max-level=8", f"--camera={camera}",
+    ]
+    environment = os.environ.copy()
+    environment["VOXELFORGE_L75_TN_BLOCK_REGRESSION"] = "1"
+    started = time.monotonic()
+    with log.open("w", encoding="utf-8") as output:
+        result = subprocess.run(command, cwd=ROOT, env=environment, stdout=output,
+                                stderr=subprocess.STDOUT, check=False, timeout=1740)
+    content = log.read_text(encoding="utf-8", errors="replace")
+    probes = []
+    for line in content.splitlines():
+        match = REGRESSION.search(line)
+        if match:
+            row = dict(PAIR.findall(match.group(1)))
+            row.update(density=float(row["density"]), proof_safe=int(row["proof_safe"]))
+            row["tile_origin"] = tuple(int(value) for value in
+                                       row["tile_origin"].strip("()").split(","))
+            probes.append(row)
+    audit_match = AUDIT.search(content)
+    if not probes or audit_match is None:
+        raise SystemExit(f"TN regression did not cover the target lattice sample; see {log}")
+    checked, samples, fallback, unknown, violations = map(int, audit_match.groups())
+    density_matches = all(abs(row["density"] - EXPECTED_DENSITY) <= 1.0e-6
+                          for row in probes)
+    false_solid_proofs = sum(row["proof_safe"] and row["verdict"] == "solid"
+                             for row in probes)
+    row = {
+        "probe": PROBE, "expected_density": EXPECTED_DENSITY,
+        "observed_densities": [probe["density"] for probe in probes],
+        "block_intervals": [{key: probe[key] for key in
+                              ("tile_origin", "step", "block", "verdict", "proof_safe", "unknown")}
+                             for probe in probes],
+        "checked_blocks": checked, "checked_samples": samples,
+        "fallback_blocks": fallback, "unknown_blocks": unknown,
+        "violations": violations, "false_solid_proofs": false_solid_proofs,
+        "exit_code": result.returncode,
+        "wall_s": round(time.monotonic() - started, 3),
+        "log": str(log.relative_to(ROOT)),
+    }
+    (OUT / "tn-block-regression.json").write_text(json.dumps(row, indent=2) + "\n",
+                                                   encoding="utf-8")
+    print("[L75TNRegression] " + json.dumps(row, sort_keys=True), flush=True)
+    if result.returncode != 0 or not density_matches or false_solid_proofs or violations:
+        raise SystemExit(f"TN block regression failed; see {log}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

Standalone/Research/WorldAssemblerM3/Linux75/RunVetoAuditL75.py

@@ -0,0 +1,104 @@
+#!/usr/bin/env python3
+"""Count first whole-tile proof vetoes among full-grid uniform observations."""
+from __future__ import annotations
+
+import json
+import re
+import subprocess
+import time
+from collections import Counter
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[4]
+OUT = ROOT / "Saved/Linux/l75/logs"
+DATA = ROOT / "Standalone/data/owner_world.json"
+BIN = ROOT / "Saved/Linux/l75/bin/VoxelForgeCoreHeadless-l75-clang"
+CAMERAS = {
+    0: (8.0, 16.0, -372.2626953125),
+    1: (25.8369140625, 3.19921875, -737.0),
+    2: (19.166015625, -14.2001953125, -753.3740234375),
+    3: (-20.0625, -5.068359375, -900.353515625),
+}
+ROW = re.compile(r"\[UniformGridCeiling\] (.*)")
+PAIR = re.compile(r"([a-zA-Z0-9_]+)=([^ ]+)")
+REASONS = {
+    0: "none_or_certified", 1: "detail_envelope", 2: "composer_candidate",
+    3: "passage_bounds", 4: "primitive_overlap", 5: "transition",
+    6: "stratum_crossing", 7: "smooth_min_slack", 8: "other",
+}
+
+
+def run(view: int) -> list[dict]:
+    camera = ",".join(f"{value:.12f}" for value in CAMERAS[view]) + ",0,0"
+    log = OUT / f"veto-view{view}.log"
+    command = [
+        "taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--", "timeout",
+        "1740s", str(BIN), str(DATA), "--world-assembler-prototype",
+        "--stream-benchmark", "--stream-pipeline", "--stream-hash-tiles",
+        "--force-generate", "--workers=8", "--clip-radius=3", "--max-clip-level=8",
+        "--max-level=8", f"--camera={camera}",
+    ]
+    started = time.monotonic()
+    with log.open("w", encoding="utf-8") as output:
+        result = subprocess.run(command, cwd=ROOT, stdout=output,
+                                stderr=subprocess.STDOUT, check=False, timeout=1740)
+    rows = []
+    for line in log.read_text(encoding="utf-8", errors="replace").splitlines():
+        match = ROW.search(line)
+        if not match:
+            continue
+        row = dict(PAIR.findall(match.group(1)))
+        key_value = row["key"].strip("()")
+        row["key"] = tuple(int(value) for value in key_value.split(","))
+        row = {key: (value if key == "key" else int(value))
+               for key, value in row.items()}
+        row.update(view=view, log=str(log.relative_to(ROOT)))
+        rows.append(row)
+    print(json.dumps({"view": view, "exit_code": result.returncode,
+                      "wall_s": round(time.monotonic() - started, 3),
+                      "tiles": len(rows), "log": str(log.relative_to(ROOT))},
+                     sort_keys=True), flush=True)
+    if result.returncode != 0 or not rows:
+        raise SystemExit(f"veto audit view {view} failed or emitted no rows; see {log}")
+    return rows
+
+
+def main() -> int:
+    if not DATA.is_file() or not BIN.is_file():
+        raise SystemExit("missing owner world or L75 Clang headless binary")
+    OUT.mkdir(parents=True, exist_ok=True)
+    all_rows = [row for view in range(4) for row in run(view)]
+    missed = [row for row in all_rows if row["samples"] > 0 and row["uniform"]
+              and not row["proof_safe"]]
+    counts = Counter(row["proof_veto"] for row in missed)
+    by_strate = []
+    for view in range(4):
+        group = [row for row in missed if row["view"] == view]
+        by_strate.append({
+            "strate": view,
+            "missed_uniform_tiles": len(group),
+            "vetoes": {REASONS.get(reason, f"unknown_{reason}"): count
+                       for reason, count in sorted(Counter(
+                           row["proof_veto"] for row in group).items())},
+        })
+    summary = {
+        "observations": len(all_rows),
+        "sampled_tiles": sum(row["samples"] > 0 for row in all_rows),
+        "true_uniform_tiles": sum(row["samples"] > 0 and row["uniform"]
+                                   for row in all_rows),
+        "missed_uniform_tiles": len(missed),
+        "vetoes": {REASONS.get(reason, f"unknown_{reason}"): count
+                   for reason, count in sorted(counts.items())},
+        "by_strate": by_strate,
+        "missed_tiles": missed,
+    }
+    (OUT / "veto-audit.json").write_text(json.dumps(summary, indent=2) + "\n",
+                                         encoding="utf-8")
+    print("[L75VetoSummary] " + json.dumps({key: value for key, value in summary.items()
+          if key != "missed_tiles"}, sort_keys=True), flush=True)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

Standalone/Source/StreamingWorld.h

@@ -891,6 +891,9 @@ private:
             Options.bandMinZVoxel=Job.BandZMin;Options.bandMaxZVoxel=Job.BandZMax;
             Options.hashDensity=bHashDensity;
             Options.allowUniformSkipsWhenHashing=bHashDensity&&bAllowUniformSkipsWhenHashing;
+            // The reference hash mode must materialize every density sample, including
+            // tiles whose sub-block intervals independently prove a uniform sign.
+            Options.forceFullDensityCapture=bHashDensity&&!bAllowUniformSkipsWhenHashing;
             Options.skipUvAndColors=bSkipUvAndColors;
             Options.skipMaterialGroups=bSkipMaterialGroups;Options.skipUv=bSkipUV;Options.skipColors=bSkipColors;
             Options.captureColumnCoordinates=bCaptureColumnCoordinates;

Standalone/Source/VoxelForge/Private/VoxelMarchingCubesMesher.cpp

@@ -17,6 +17,7 @@
 #include "Misc/CommandLine.h"
 #include <atomic>
 #include <bit>
+#include <cstdlib>
 #include <immintrin.h>
 #include <unordered_map>
 
@@ -28,6 +29,15 @@ namespace
         GVoxelForgeUseOperatorBlock,
         TEXT("Use the operator-major density block path for non-shared mesher grids."));
     bool GVoxelForgeBlockSwitchParsed = false;
+    bool VF_IsL75TnBlockRegressionEnabled()
+    {
+        static const bool Enabled=[]
+        {
+            const char* Value=std::getenv("VOXELFORGE_L75_TN_BLOCK_REGRESSION");
+            return Value&&Value[0]=='1'&&Value[1]=='\0';
+        }();
+        return Enabled;
+    }
     int32 GVoxelForgeRawSkirtsForAudit = 0;
     bool GVoxelForgeRawSkirtsSwitchParsed = false;
 
@@ -644,10 +654,44 @@ FVoxelMeshData UVoxelMarchingCubesMesher::GenerateMesh(FIntVector OriginVoxels,
                         bBlockUnknown=ShapeVerdict.bUnknown;
                         bBlockNative=ShapeVerdict.bNativeSurface;
                         bBlockProofSafe=ShapeVerdict.bSkipSafe;
+                        if(VF_IsL75TnBlockRegressionEnabled())
+                        {
+                            constexpr int32 ProbeX=-80,ProbeY=-20,ProbeZ=-3218;
+                            const auto IsCapturedGridPoint=[&](int32 Value,int32 Start)
+                            {
+                                const int32 Delta=Value-Start;
+                                return Delta%Step==0&&Delta/Step>=-1
+                                    &&Delta/Step<=BlockCells+1;
+                            };
+                            if(IsCapturedGridPoint(ProbeX,BlockOrigin.X)
+                                &&IsCapturedGridPoint(ProbeY,BlockOrigin.Y)
+                                &&IsCapturedGridPoint(ProbeZ,BlockOrigin.Z))
+                            {
+                                const float Density=ShapeWorldContext->DensityAtLattice(
+                                    ProbeX,ProbeY,ProbeZ);
+                                const std::string Dispatch=ShapeWorldContext->DensityDispatchPathAt(
+                                    static_cast<float>(ProbeX),static_cast<float>(ProbeY),
+                                    static_cast<float>(ProbeZ));
+                                const EVoxelTileClass GeneratorVerdict=Generator->ClassifyTile(
+                                    BlockOrigin,Step,BlockCells);
+                                const char* Label=Verdict==EVoxelTileClass::AllSolid?"solid":
+                                    Verdict==EVoxelTileClass::AllAir?"air":"mixed";
+                                const char* GeneratorLabel=GeneratorVerdict==EVoxelTileClass::AllSolid
+                                    ?"solid":GeneratorVerdict==EVoxelTileClass::AllAir?"air":"mixed";
+                                std::printf("[L75TNBlockRegression] tile_origin=(%d,%d,%d) step=%d cells=%d block=(%d,%d,%d) verdict=%s proof_safe=%d unknown=%d density=%.9g dispatch=%s generator_verdict=%s\n",
+                                    OriginVoxels.X,OriginVoxels.Y,OriginVoxels.Z,Step,
+                                    CellsPerAxis,BlockX,BlockY,BlockZ,Label,
+                                    bBlockProofSafe?1:0,bBlockUnknown?1:0,Density,
+                                    Dispatch.c_str(),GeneratorLabel);
+                            }
+                        }
                         if((Verdict==EVoxelTileClass::AllSolid
                                 ||Verdict==EVoxelTileClass::AllAir)
                             &&!bBlockProofSafe)
                         {
+                            // An uncertified uniform candidate makes the parent block grid
+                            // unusable as a sampling certificate. Keep the committed fallback:
+                            // fill the full density grid for this tile.
                             bCanSkipProofBlockGrid=false;
                             bAllRelevantBlocksProofSafe=false;
                         }

Standalone/Tools/verify/baselines/owner-hash/canonical/owner-hash-floating-islands-style2-l75-fullgrid.baseline

@@ -0,0 +1,12 @@
+[PipelineFullDetailHash] tiles=960 density=0x151044001ea90cd5 mesh=0xa818654be89790ac payload=0x370ff80451105a39 topology=0x06e507557aa70173
+[PipelineWholeViewHash] tiles=2370 density=0xf7bb51a4667eac72 mesh=0x937b616fe3c0bdc2 payload=0x230c904a12575f05 topology=0x6284613657ddb7fe
+[PipelineLODHash] lod=0 tiles=512 density=0x2fd4c78685a43cfe mesh=0x50478cff1c1f8ca0 payload=0x54e48e57e0af26de topology=0x860c011cfdb9833a
+[PipelineLODHash] lod=1 tiles=448 density=0x64bb55bd41e9fd42 mesh=0x17e89b7087bfe711 payload=0x2389c109eb780db6 topology=0x7eccd4cf560d0630
+[PipelineLODHash] lod=2 tiles=320 density=0x1edcfc338a395eaf mesh=0xc647d1e056e370cd payload=0xf81bba773df803ee topology=0xac68f4c0b6647735
+[PipelineLODHash] lod=3 tiles=208 density=0x580ede5c492925c7 mesh=0x30aeb3422a9382ef payload=0xb09b16ae1d40ac0d topology=0xd85e165b364261b5
+[PipelineLODHash] lod=4 tiles=240 density=0xfb11591772a3d18e mesh=0xebf2baee8764591b payload=0xe491d7ac9c0061ad topology=0xd618ac33b95ce494
+[PipelineLODHash] lod=5 tiles=144 density=0x2f8b7b7fb1e67258 mesh=0x4cd508cbe97344fd payload=0x2b6e96a6050458c9 topology=0x4ff6d0eda8988573
+[PipelineLODHash] lod=6 tiles=96 density=0x0114a34c8b8d6113 mesh=0xb1fec4d01ae1fa44 payload=0x3e50cfd429b8e950 topology=0x08090c96d15c1618
+[PipelineLODHash] lod=7 tiles=96 density=0x3836ed8cfce73418 mesh=0x40bc6589c5fc1aac payload=0x677349bcae16790f topology=0x36e3aa53192e6a6b
+[PipelineLODHash] lod=8 tiles=306 density=0x144f3c1fd722708b mesh=0xef77b28bf7fd9453 payload=0xe3f47b37fcd61489 topology=0x5a3c73e295494e04
+[PipelineExactQueryHash] probes=9 density=0x7b7c50ac24ccadcc unclamped=0x7b7c50ac24ccadcc detail=0xefcba20c0c70c415 collision=0xe604823a249029bf path=direct-Core-queries

Standalone/Tools/verify/verify.py

@@ -125,10 +125,11 @@ def owner_hash_baseline(recipe: str, style: int) -> tuple[Path, str]:
         return (BASELINES / "owner-hash/canonical/owner-hash-surface-world-style1-v212.baseline",
                 "L67-v212")
     if recipe == "floating-islands" and style == 2:
-        # L74 disables a legacy sub-tile shortcut after its falsifier found false solids.
-        # Keep the old fixture intact and pin the restored full-grid density signature.
-        return (BASELINES / "owner-hash/canonical/owner-hash-floating-islands-style2-l74-fullgrid.baseline",
-                "L74-full-grid")
+        # L75 explicitly materializes every reference density sample. The older L74
+        # signature omitted samples skipped inside native uniform blocks; retain that
+        # fixture and pin the current full-grid signature separately.
+        return (BASELINES / "owner-hash/canonical/owner-hash-floating-islands-style2-l75-fullgrid.baseline",
+                "L75-full-grid")
     raise VerificationFailure(f"no pinned owner hash baseline for {recipe} style {style}")