The models are kindly provided by Jeremy Birn, created for the second lighting and rendering challenge taking place in the Lighting and Rendering forums section.

It was another test for my EI03 mental ray implementation. This BRDF provides a statistically-based reflection model for rough surfaces, visit http://www.cs.purdue.edu/homes/sun/CIRL/Project/PhysIllumModel/physIllumModel.html for details.
In the end it's just a little peek of what's possible when I seriously get into action and find the time to get some stuff done. I hope I'll find this time at some point, it's a shame I cant buy some..