Remember those LED graffiti cans from a couple of months back? Well, they've just been trumped by multimedia duo Sweatshoppe (gotta love that olde-worlde spelling, forsooth) who use video mapping techniques to "video paint" naked and dowdy walls.
The street artists use a paint roller made of green LEDs to lay their projections on a surface. It's all aided by a camera beside the projector beams which tracks the paint roller and beams the video onto the correct bit of wall.
The software which controls the video was developed by Sweatshoppe themselves (artists Bruno Levy and Blake Shaw) and there are plans to release it, once it's in a more user-friendly format.
Wooster Collective Via Gizmodo