profbetis wrote:The Universal Material has a strange behavior at low specular roughness values. It has these harmonic ring looking artifacts. These artifacts fade away as roughness approaches 0.002 and up.
I tested the same on the metallic material and no such artifacts exist.
Ray Epsilon has no affect.
The rings shift around when the metallic parameter is adjusted, in my case around the values 0.9 to 1.0
Can you confirm you are using RC7? I can see this artifact in RC6, and I have already resolved this bug.
Double checking in RC7, I am not actually seeing any of these artifacts anymore.