In the same post:

Another promising result of the last days (this time from tomb) is the new material based on the asperity scattering BRDF. It's called "velvet" and can be useful in simulating some velvet-ysh materials like, well, velvet,  peach, surface layer of human skin and so forth. 

http://www.luxrender.net/forum/viewforum.php?f=30

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