Hi

attached is a very simple scene of a sphere with a materialX standard surface shader. The diffusecolor should be driven by primvars on the object if those primvars exist - if not it should use the fallback color.

However this doesn't seem to work, no matter what I enter in "fallback", the outcome is always black. Am I doing something wrong?

Cheers,
M

Are you on the release build? Try a fresh daily build as I saw this appear in the Changelogs [www.sidefx.com]