Concept art sketches of Carl from Pixar’s Up
Although the sketches only tell part of the story I really like to see this sort of process where the artist slowly brings the character to life. Each sketch is a character onto itself but finding Carl through all of these is the challenge/reward.
I think my favorite tweak from the first Carl drawn to the final Carl is the length of his neck. Oh, and the sideburns Carl sports near age 50 are super.