blender-game-optimization

1# Game Optimization
2 
3The execution model is in `blender-core`. Always re-run `blender-asset-qa` after optimizing.
4 
5## Procedure
61. **Measure**: `scripts/mesh_stats.py -- --objects ... --budget mobile|roblox|web|vr|console|pc`. It returns tris, estimated draw calls, materials, texture VRAM, bones, and the over-budget items.
72. **Clean**: `make_lods.py --cleanup` (merge by distance 0.1 mm, dissolve degenerate, delete loose). Remove hidden faces: back-to-back faces and faces under other parts (`qa_check` → `back_to_back`, plus manual xray).
83. **Reduce in this order** (cheapest visual loss first): hidden/interior geometry → unnecessary edge loops on flat areas (Limited Dissolve 1–5°) → over-segmented cylinders → Decimate → bake detail to normals (`blender-texture-baking`).
94. **Materials**: merge to 1–2 per asset (atlas / trim sheet / shared tiling material). Each material slot per mesh is roughly one draw call.
105. **LODs**: `scripts/make_lods.py -- --objects SM_X --rename` creates `_LOD1.._LOD3` at 50/25/12.5%. Check every LOD silhouette with `look`/`review_shots`.
116. **Re-measure**, then QA, then export (`blender-export-pipelines`).
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13## Budgets (guidance per asset, 2026)
14| Platform | Hero char tris | Prop tris | Mats/asset | Max texture | Bones |
15|---|---|---|---|---|---|
16| Mobile | 5–15k | 0.3–3k | 1–2 | 1024 | ≤75 |
17…