Thank you all for your replies and suggestions. I will check out the programs you suggested. With Vue 2 I have had some problems importing some dxf objects, either with the object being deformed or vue crashing while trying to import. I have tried with Amapi (sometimes deformed), Blender (crash), poser 4 (seems to work OK with figures and primitives), and spatch (deformed). Sometimes if a model crashes in vue and I take it and open and save in another modeling program it works (such as taking a blender model and resaving it in Amapi). Maybe this is just a problem with Vue 2. I have tried the free Truespace 1 but without the manual was kind of lost. I was impressed with the variety of tools and the materials editor and the reduced price for version 5 along with Vue 4 being able to import .cob files makes it sound really attractive. Does anyone know if Truespace has primitive boolean operations? It didn't seem to have it in version 1.