>>1831152Tracing/drawing/painting over 3D models is something a lot of industry people use. Concept artists especially. Our studio even buys 3D models that other people have made just because of production scheduling. Here's a pro using it:
http://www.ctrlpaint.com/videos/sketchup-for-complex-backgrounds-1-of-3>>1831173That works for me, but again only if you have the time.