I don't understand how they can even put that stipulation on it.  The software generates Mesh, it's not proprietary, the software is.  It's not like a Daz Model where they spent a billion hours making a figure, it's flat planes run through a sim.

How can they make any stipulation on what you do with it once you've put your own blood sweat and tears into the output?  Maybe you don't pass around their textures but if I come up with something I like and take it into max and work it into a cr2 they're going to tell me I can't sell it?

Is that "Legal"?  Or is that wishful thinking on their part?