I am using a just downloaded trial version, and I have come across some questions.
I am importing STEP files from Ashlar Cobalt, using a Mac running Lion, and the rendering is amazing, easy and fast- except that a few surfaces are missing- by that I mean solids have missing faces. IGES import failed and gave an error message, STEP import gave no errors, but some surfaces are absent. DXF failed as well. I don't see any other formats to try. I'm pretty careful about the geometry, and the parts all check out well internally as far as Cobalt is concerned. I would really like KeyShot to work for me, but so far it isn't.