I’ve been experimenting with a fantastic piece of software called Alchemy. It’s designed for the the silhouette process in developing characters, vehicles, etc. It allows you to create random shapes as a basis to start exploring design. Best of all.. it’s FREE! I highly recommend it. This isn’t what it is really supposed to be used for but I was just having fun and exploring the software. If you are into concept design, you should go download it now!