Here is a picture showing all the assets for an episode of BB3B's. We animated 3 episodes and this was from Zombie Pizza Eaters. You can see all the artwork that was supplied to us in Flash for the episode. The main characters have turn arounds but the episode specific designs are just drawings. If you watched the series you may notice that the Grandma is slightly different. Her design changed during production. It was just an aesthetic decision, the final design works much better I think.