Partly Cloudy is a Pixar CGI animated short film directed by Peter Sohn and produced by Kevin Reher. It was shown in theaters before Up. Pixar says ” The challenge to make characters from clouds was one of the more daunting technical aspects for the director. Because a cloud is made of nothing more than moisture and light, the designer and animators of “Partly Cloudy” has a difficult time.

Pixar has released yet another animated short film ‘BURN E’. This was attached to the movie’s DVD and Blu-ray Disc release on November 18, 2008. It has been produced at the same time as Wall E, directed by WALL-E lead animator Angus MacLane.