Anisotropy Rollout (Physical Material)

The Physical Material's Anisotropy rollout stretches highlights and reflections in specified directions to give the effect of having grain.

Interface

Anisotropy
The U-direction roughness in relation to the V-direction roughness. Click the button next to Anisotropy to select a map, scene material or sample.
Rotation
The anisotropy angle. The range 0 to 1 maps one full revolution. Click the button next to Anisotropy to select a map, scene material or sample.
Auto
Automatically orients the anisotropy.
Map channel
Orients the anisotropy based on a given texture space.