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wip(assembler): round L36 -- tunnel floor without washboard; FI mouth without shards (evaluator v23)

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The walk tread was built per segment as a one-sided density clamp, so its crossing with the native
field moved at segment joins (L35: 2.25-2.48 cm washboard). Treads now overlap up to 2 m as bounded
signed-distance slabs (0.06 cm residual). The FI mouth's crater detail and tread met without a smooth
join; v23 filters the local field, drops thin isolated solids and smooth-unions the tread with the
terrain. New floor ripple and mouth fragment/crease audits with L35 as failing controls. 24/24
passage rows, 30/30 determinism, 16/16 invariants, LOD0-8 rings; cost within noise.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CSFYgsdW8ejZSyiMf4qRSX
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Fr0zkaandClaude Opus 5.5 committed 2026-10-22 13:01:54 +02:00
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@@ -1250,11 +1250,24 @@ ARCHITECTURE §8.47 and
| `VF_FieldPassageWallRelief` | `Standalone/Core/src/VoxelForgeFieldShared.h` | Supplies passage-only irregular wall relief at rotated 43/29/19 m scales. Other `VF_FieldSurfaceRelief` users stay unchanged. |
| `ApplyResolvedStratePassageCarves` | `Standalone/Core/src/ShapeWorldInternal.h` | Catmull–Rom smooths eligible interior sweep joins, applies passage-only wall relief, and tapers/grains the entry support shoulder below the capsule/support probe footprint. |
| `PlanResolvedLayoutPassagesV1` | `Standalone/Core/src/ResolvedLayoutInternal.h` | Gives each Cascade turn a seeded shallow radial profile instead of identical repeated full-depth cosine lobes. |
| `auditPassageRipples` / `PassageRippleAudit` | `Standalone/Source/StreamBenchmarkPipeline.h` | Samples field wall radius at 0.125 m spacing, scans periods 0.5–8 m in 32 m windows, and rejects amplitudes ≥0.035 m. The negative control uses 2 m radius spheres at 1.5 m spacing. |
| `auditPassageRipples` / `PassageRippleAudit` | `Standalone/Source/StreamBenchmarkPipeline.h` | Samples wall radii and walk-floor zero crossings at 0.125 m spacing, scans periods 0.5–8 m in 32 m windows, and rejects wall/floor amplitudes ≥0.035/0.015 m. Sphere and beaded-floor controls must be detected. |
`WorldAssemblyEvaluatorVersion=21`. See ARCHITECTURE §8.48 and
[`Standalone/Research/WorldAssemblerM3/Linux35/REPORT.md`](Standalone/Research/WorldAssemblerM3/Linux35/REPORT.md).
### 3.32 Walk-floor washboard and FI mouth blend — World Assembler M3 L36
| Symbol | Canonical file | Role |
|---|---|---|
| `ApplyResolvedStratePassageCarves` | `Standalone/Core/src/ShapeWorldInternal.h` | Extends eligible tread sections by up to 2 m and uses bounded signed-distance support on every sparse route, including SurfaceWorld-to-TunnelNetwork, removes seeded shoulder grain, and seats regular tread tops 5 cm lower with a smooth return at the lower landing. Capsule/open-air gates remain. Gravity-facing wall relief is reduced; side and ceiling relief remain. |
| `ApplyResolvedStratePassageCarves` mouth support | `Standalone/Core/src/ShapeWorldInternal.h` | Builds exact signed-distance route-mouth tread boxes and smooth-unions them with native terrain over 1.5 m. |
| `NativeFloatingIslandDensityAt` | `Standalone/Core/src/ShapeWorldInternal.h` | Applies a local 2 m symmetric signed-field filter around FI passage mouths, exempts resolved route support, and removes isolated negative samples thinner than 2 m on all axes. |
| `auditPassageRipples` / `PassageRippleAudit` | `Standalone/Source/StreamBenchmarkPipeline.h` | Keeps the wall-radius audit and adds walk-floor zero-crossing profiles at 0.125 m, with five 32 m windows and a 0.015 m limit plus a beaded-floor negative control. |
| `RunMouthFragmentAuditL36.py`, `ProbeWalkFloorProfileL36.py` | `Standalone/Research/WorldAssemblerM3/Linux36/` | Compare L35 floor and FI-mouth controls with L36; the mouth check fails on detached components at or above 0.0001 m² and checks normal jumps across the fade ring. |
`WorldAssemblyEvaluatorVersion=23`. See ARCHITECTURE §8.49 and
[`Standalone/Research/WorldAssemblerM3/Linux36/REPORT.md`](Standalone/Research/WorldAssemblerM3/Linux36/REPORT.md).
## 4. The density pipeline (most-edited hot path)
### 4.1 `GetDensityWithParams` (TunnelNetwork) — VoxelGenerator.cpp:3749