I've been creating custom materials appearances the last few months and applying them to plenty of models. However, as it is, if I change a parameter such as opacity or reflectivity or even color and save it, the parts with this appearance applied do not update to the new standards. You have to manually reapply the material to get the new setting to take. And when you're talking about 100's of screws or a bunch of aluminum extrusions, this is a huge pain in the neck. Is there any way I can get it to automatically update the appearance upon a rebuild or something like that?