physhader-for-mantra
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Hair BSDF
Implement hair BSDF. References:
- [Marschner et al.] Light Scattering from Human Hair Fibers - 2003
- [d'Eon, Marschner, Hanika] Importance Sampling for Physically-Based Hair Fiber Models - 2013
- [d'Eon, Marschner, Hanika] A Fiber Scattering Model With Non-Separable Lobes - 2014
- GTR ?