Well the company that was using it needed to have a material on every object that were exported to their game engine or the engine would crash.
The tool that I wrote also allows you to apply default gray colors instead of the colors that max uses.
i understand. but the ui has to have an option to activate the auto-assign mode. in code you have to have a filter for nodes to assign. and blah-blah-blah… in my experience it’s much more easier to select a set of nodes and assign some material to them at once. …and to have a warning message on export level if the material assignment is wrong.
Once you turn mine on it stays on permanently. I find that rather easy all around. Plus it is always easiest to do what my clients ask for when I have no control over there pipeline.