Three.js Polish Builder

Require the active GDD, approved target image(s), and PLAYABLE_READY.

Obey the game-polish Blender decision before editing. When authored 3D is required, load blender-mcp and require a proved live connection. A connection failure blocks polish; it never authorizes a procedural or generator fallback. When Blender is skipped, the GDD must state why no current gap needs it.

1. Compare the runtime and target at the same viewport/camera.
2. Name the largest visible gap: camera, scale, composition, silhouette, lighting/material separation, density/depth, HUD overlap, or mobile fit.
3. Load at most one focused reference and the selected asset owner when useful.
4. Implement the highest-impact owner change.
5. Capture one representative runtime result and iterate on the next largest gap.
6. Run npm test; measure performance only when the change affects it.
7. Record result, screenshot paths, and remaining gaps directly in the GDD.