I want to add several windows to a single gmax object. I have no trouble adding the first one using:Compound objectsBooleanPick operand BCut, remove insideThis works perfectly, but when I try a second similar operation to cut a second window....it does not happen.What am I doing wrong? How do I get several windows in the same gmax object?Thanks for any help,Ted

Hi Ted,I've experienced the same problem when one ore more edges are colinear. In gmax help it's written that is recomended not to create compound objects if operand A have normals pointing in different directions or if both operands have similar size. Try to use as operand B a simple box wich can be totally projected inside the face of operand A.Costin

Thanks, Costin, I'll give that a try.Ted