I have the following code (taken and adapted from PhilC's Python for Poser book), that work fine when I try to change the Diffuse Color of a Material:

 

    actor = (scene.Actor("hutRoofLP_19"))       
    mat = actor.Materials()[0]
    # find the material's shader tree and its root
    tree = mat.ShaderTree()
    root = tree.Node(0)
    # find the Diffuse_Color node.
    diffCol = root.InputByInternalName("Diffuse_Color") # <<< OK
    diffCol = root.InputByInternalName("Alternate_Diffuse") # <<< ERROR
    diffCol.SetColor(1,0,0)

However, I need to change the Alternate_Diffuse value, and that gives the following error:

AttributeError: 'NoneType' object has no attribute 'SetColor'

Anybody knows how to correctly address the Alternate Diffuse ? Thanks

 

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