Painted directly over a frame from the Disney film, The Black Cauldron (I love that movie!) Rose-tinted nostalgia glasses aside, I don't believe the film wasn't without flaws --but I feel like it had a lot of potential. Would be so cool if they remade it into a live action someday.
*Just to clarify. I'm not trying to improve upon the original --this exercise is just extremely useful to me since I sometimes have to do paint-overs ontop of flat 3D models for jobs.
Painting over frames was an idea that the concept artist Tyson Murphy murph3.deviantart.com/
started. It's really fun! (And he does it x1000 better than me, check out his stuff!)