zwitschi
f2863abeac
Each generated prop used one material per part (body, accent, metal...). The model pipeline now packs a prop's palette into one power-of-two colour atlas plus a matching metallic/roughness atlas and emits a single material: - atlas_for(): 8x8 cells per palette role, colours in sRGB, roughness in the G and metallic in the B channel of the second atlas; NEAREST sampling keeps cells flat. - build_glb(): every part merges into one primitive with constant per-vertex atlas UVs; the material uses baseColorTexture + metallicRoughnessTexture with factors 1.0. - audit_glb(): fails unless a prop has exactly one material, both atlas textures, two images, and TEXCOORD_0 on every primitive. - Removed the now-unused sRGB->linear factor helpers; colour travels in the texture. Verification: headless 181 -> 182 (new "one material per prop scene" test), Python tooling 53/53 (atlas determinism/size/UV/palette-override tests replace the old factor tests), model audit OK for all six props, screenshots regenerated and screen_designs.py compare still 6 good / 0 bad. Version 0.3.1.