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1081fb472f
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feat(renderer): improve IBL with Hosek-Wilkie sky, SH irradiance, GPU BRDF LUT
- Hosek-Wilkie inspired procedural sky (Rayleigh/Mie scattering, sun disk)
- L2 Spherical Harmonics irradiance (9 coefficients, CPU computation)
- SH evaluation in shader replaces sample_environment for diffuse IBL
- GPU compute BRDF LUT (Rg16Float, higher precision than CPU Rgba8Unorm)
- SkyParams (sun_direction, turbidity) in ShadowUniform
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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2026-03-25 20:58:28 +09:00 |
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