Wll, the difference between Material, Material Collection, and MAT Pose seems to be pretty slight. They all start with the version number block. Then: Material: "actor $CURRENT" Material Collection: "mtlCollection" MAT Pose: "figure" The rest of the file is identical, but the basic Material files doesn't seem to care about the actual name used for the single material it contains. Now, I have examples of partial materials in MAT Pose files, but I haven't tried these in a Material file. And because a Material file replaces the whole shader tree, I doubt a partial one would do anything useful. It would have to be matched to the material it modified.