Hi danperk, I thought that Acrobat supported 3DM files directly...

I see now in your original message you mentioned IGES format. There is a concept of a "level" in IGES which is like a layer. I'm not sure yet if the software library that I'm using for IGES is set up to associate a color with a level instead of an object though.

Maybe 3DM is something that you have to enable. If you can enable it that will probably be the way to go.

- Michael