So Im trying out this PolyBrush software. Currently free and in beta phase for about 30 days. Drawing within the program is quite intuitive, if a little fiddly when trying to position the workspace in a specific position. Plan on having fun with it over the coming days though. Here's a little test I did taking a random 'doodle' from PolyBrush in to Keyshot and then Photoshop.