feat: colored PCB assembly — STEP materials preserved (11 colors)

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- Scene GLB export preserves per-geometry materials from STEP files
- 158 sub-meshes with individual colors:
  - Green PCB substrate (20,51,36)
  - Orange copper traces (226,138,7)
  - Silver pads/solder (165,163,146)
  - Black IC bodies (5,5,5)
  - Yellow silkscreen (198,196,160)
- 397K vertices, 334K faces, 2.5MB (was 8.4MB gray)
- Board thickness visible (12.1mm Z-depth)
- BMU board + 4x switch MOSFET properly assembled

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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Clément SAILLANT

2026-03-30 17:00:55 +00:00

parent 5959141642

commit 4d7a2580af

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public/assets/models3d/bmu-assembly.glb

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