Physically Based Rendering

Microfacet Models for Refraction through Rough Surfaces

这篇论文。。。名字被我忘记了 找了好久。。。之前存电脑里的

ggx beckmann

 

找的过程中发现另一篇论文An Introduction to BRDF Models

brdf是四维的函数 

 

基于物理的渲染 包括

pb 　shading／／brdf那套 还有能量守恒  normalize brdf

pb light