A commission for Jagoth, a friend of mine. He wanted his character as a reindeer, with four versions - wet, messy, clean, and diaperless. Was pretty fun overall.
I lined it on a sheet of paper, then added a second layer with the diaper. I overlayed the diaper in Photoshop, and modified this base drawing to get all the versions.
Diaperless version is here: http://envyart.soup.io/post/512051599/Christmas-commission-for-Jagoth