Shared halo + deterministic border-quad ownership + T-junction conformance: 625/625 same-LOD for all three. LOD 2:1 prototype (collar zipper) fails MC 5 / hybrid 38 / DC 40 cases (corners, overhangs). Hybrid is bit-identical to MC on a sampled native SurfaceWorld cliff; DC rougher. Standalone only. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01MmSoF64BbRFmk9C3p1VsBJ
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| 1 | method | phase_x_m | phase_y_m | phase_z_m | contour_expected | unmatched_probes | contour_mean_m | contour_max_m | boundary_edges | nonmanifold_edges | edges_before | nonmanifold_before | transition_triangles | paired_loops | capped_loops | unmatched_loops | transition_surface_max_m | fine_segments | coarse_segments |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | MC | 0.25 | 0.1 | 0.1 | true | 0 | 0.11871 | 0.249977 | 0 | 0 | 78 | 0 | 234 | 1 | 0 | 0 | 0.233333 | 52 | 26 |
| 3 | Hybrid | 0.25 | 0.1 | 0.1 | true | 0 | 0.0929318 | 0.419411 | 0 | 0 | 82 | 0 | 246 | 1 | 0 | 0 | 0.238888 | 56 | 26 |
| 4 | DC | 0.25 | 0.1 | 0.1 | true | 0 | 0.0929318 | 0.419411 | 0 | 0 | 82 | 0 | 246 | 1 | 0 | 0 | 0.238888 | 56 | 26 |