I'm wondering the same, is the CAD software the same as 3D Studio Max, does it let you make the same 3D models as 3DSM. I did download 3DSM but it would let me go on it as it kept saying, error a file cannot be found, and it wouldnt work for me. Is CAD just as good? Plus the titanic wreck model is absolutely stunning, looks just like the real thing. The alvin is well good aswell.