Hello Marcus, Tree Druid has an on-line manual at www.zenstar.com I can't speak for the stand alone version of Tree Druid as I have the Carrara Plug-in version. In the plug-in version there are separate shaders for the trunk, branches, boughs and leaves, although. I'd thinks that there is a similar function from the stand alone. Sorry that I'm not a little more helpful on this one. Mark