photoshop tennis
A game originally created by Coudal Partners where two opponents pass an image back and forth editing the image with Photoshop (other layered image editing programs such as the GIMP can be used), in an attempt to creatively out maneuver their opponent. A judge or judging panel is usually decided before the match begins to decide the winner. Matches usually last ten rounds.
Photoshop Tennis is a great way to get the creative juices flowing