Axel Meyer 5351923dd6 feat(maps): per-cell-origin bitmask branch unlocks 47-blob ...

compute_cell_bitmask_v3 now branches: cells where
cells_material is set use the classical 47-blob 8-neighbour rule
on effective material; vertex-only cells continue to use the
FIX-A 4-own-corner rule (v0.5.6 dual-grid). The 8-neighbour
branch evaluates each neighbour through cell_has_material so
cell-tile material and vertex-tile material both count as
neighbours.

A vertex-only cell adjacent to a cell-tile cell remains
structurally blind to its neighbour because its 4-corner rule
only reads its own corner vertices. This asymmetric seam at
in-layer mode boundaries is documented behaviour, not a bug.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-06-01 22:13:26 +02:00

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