2 votes
Accepted

What does GGX stand for?

According to E. Heitz (Sampling the GGX Distribution of Visible Normals) it stands for "ground glass unknown". I am not sure what the word unknown means though. By the way, it is equivalent ...
Aleš Koblížek's user avatar
2 votes
Accepted

Importance sampling microfacet BRDF and coordinate frame

The importance sampling methods for the two reflection models you mentioned are different - they pretty much reflect their definition. Cook-Torrance model describes the surface as a collection of ...
Aleš Koblížek's user avatar

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