I was having a problem doing a boolean operation on a couple of objects created with the free form modeler, every time I tried to do it Ray Dream would lock up. I think I know why but I dont know what to do to fix it. I think the reason is that the two objects created in the free form modeler are hollow to begin with and when I try to do a boolean on them like you would on two primitive solid objects, Ray Dream freaks out and shuts down. I am hoping that the solution would be to make the two objects I am working with solid objects and then try to use a boolean operation on them. So my question is this, how do you make a free form object solid all the way through. Thanks.