>>any sort of way that two selection sets can be useful in MAX<< Hey Brian, You can use the Named Selection Set field in the main toolbar to create sub-object sets and then perform "boolean" operations on the sets in Edit Named Selection Sets, but that doesn't work at the object level. I'm pretty sure it used to, but not in the last few releases. I suppose Scene Explorer might be used along those lines somehow. I'll check when I get a chance. By the way, you sent me an email a while back about cgarchitect articles and it's gone into the "ether". Could you resend that? Thanks Ted