Hi Christopher!
Thanks for your answer, I tried to use partial but got the same error, so
If you can show how you did it that would be great.
I looked through the echoed history of what happens when I manually add the
vray material attr and found some lines of code that looked interesting. If
I add the line "vrayAddAttr VRayMtl1 vrayMaterialId" I was able to set the
material id without the error I described earlier.
Hmmm, not clear what that line does ... but somehow it make Maya aware that
the attr exists :)
(Btw It looks like the line that contains "vrayAddAttr VRayMtl1
vrayColorId" is not necessary)
Br,
johan
mat = 'VRayMtl1'
id = 4
mel.eval('vray addAttributesFromGroup {0} vray_material_id 1;'.format(mat))
#mel.eval('vrayAddAttr {0} vrayColorId;'.format(mat))
mel.eval('vrayAddAttr {0} vrayMaterialId;'.format(mat))
cmds.setAttr (('{0}.vrayMaterialId'.format(mat)), id)
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