Btrc

GPU wavefront path tracer using two-stage programming

Work in progress...

TODO

• [x] volume primitive
• [x] filter importance sampling
• [x] disney bsdf
• [x] halton sampler
• [x] shadow terminator
• [ ] lightweight photon mapping
• [ ] separable bssrdf
• [ ] multi-scatter ggx, microfacet normalmap
• [ ] radiance cache
• [ ] displacement map
• [ ] many lights
• [ ] path guiding

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