Replaces the render stub with the full M1 surface:
- camera: ortho iso rig, wheel zoom, middle/right-drag + WASD pan, resize
- ground: shader tile grid w/ world-edge dissolve + screen-space vignette
- registry: procedural placeholders (two-material rule) + MODELBEAST GLB
hot-swap, probed on init and every 10s in dev. GLBs auto-normalise to
the machine footprint, so any export scale lands correctly.
- belts: InstancedMesh per belt def, chevron scroll injected into a
MeshStandardMaterial so belts keep lighting/fog/brownout
- cargo: InstancedMesh per item type, interpolated across ticks via alpha
- ghost + pickTile with footprint occupancy (cyan valid / red blocked)
- feedback: jam klaxon blink, brownout dims the scene via tone-mapping
exposure so emissives dim too
Machine accents are derived from data (recipes -> outputs -> ItemDef.color),
with a legibility floor: near-black products like MDAT ORE would otherwise
render the extractor's CRT head as a black panel and its ore as invisible.
Verified in the dev build: 500 entities + 2,000 belt items at 3.2ms/frame
(5 instanced draw calls); a GLB dropped in mid-session swaps without reload.
Dev scaffold is DEV-gated and tree-shaken from the prod bundle.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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