Do any of you have an idea what the bump amplitude is an amplitude of? In Poser, bump is applied as a percentage of the default measuring unit; but I've never been able to find a definition for the bump amplitude in Carrara. I don't think Poser and Carrara use the same definition, because when I import Poser scenes to Carrara, I have to adjust bump amplitudes. I'm tired of guessing. And, while I'm at the subject: change a bump-map's brightness and the bump amplitude changes, too - is there any substantive difference between changing the brightness and changing the amplitude, or are they really the same? Thanks -