The Facadeprinter is a software controled robot, slightly similar to a paintball-gun mounted on the ground.
It can print large images on a surface by shooting small balls of paint on it. It works from a distance of 12 meters and each dot in a print is about 5-10 cm, which is the size of a splashed paint-ball.
The Facadeprinter is created by three young product designers based in Berlin. The machine is not for sale but you can order a print at the website – that is, if you have legal access to a big wall. Check the website for more information and images.
Made in 2005 the PrintBall by Recyclism:
http://www.recyclism.com/printball.php