>>Poly count before and after Attach stayed at 103. After Collapse the count jumped to 326 polys. Is this a desirable outcome?<< Hi Angela, Generally speaking, the Collapse utility shouldn't change the face count as it doesn't do anything to the geometry...unless you checked the Boolean option. I tend not to recommend Boolean's in max or viz unless absolutely necessary because they are inefficient, prone to failure, and difficult to control faces. Could that have been the case with your example? Ted