Can I just point out the insanity of 3D models being subject to trademark and copyright? You can take/paint/draw a picture of a mailbox and post it but if you make a 3D model all of the sudden the legal system loses it's goddamn mind. It's been a huge issue in the video game space where companies are suing for licencing whenever someone includes something in a game, including FOSS game efforts (Honda Jet removed from Flight Gear).
Why can't we just leave art alone?