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tolelom 5232552aa4 feat(renderer): add normal mapping and procedural IBL to PBR shader

- Add tangent input (location 3) and TBN computation in vertex shader
- Add normal map sampling (group 1, bindings 2-3) for tangent-space normal mapping
- Add BRDF LUT binding (group 4, bindings 0-1) for specular IBL
- Add procedural sky environment function for diffuse/specular IBL
- Replace flat ambient with split-sum IBL approximation
- Add pbr_texture_bind_group_layout (4 entries: albedo + normal)
- Add create_pbr_texture_bind_group helper and flat_normal_1x1 texture
- Update create_pbr_pipeline to accept ibl_layout parameter (group 4)

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

2026-03-24 21:28:32 +09:00

assets

feat: add model viewer demo with OBJ loading, Blinn-Phong lighting, FPS camera

2026-03-24 19:56:28 +09:00

crates

feat(renderer): add normal mapping and procedural IBL to PBR shader

2026-03-24 21:28:32 +09:00

docs/superpowers

docs: add Phase 4c normal mapping + IBL implementation plan

2026-03-24 21:16:39 +09:00

examples

feat: add shadow demo with directional light shadow mapping and 3x3 PCF