I was just talking about the size ofone of the buildings that they did.It's a free program that anyone can use if you have a webcam and a projector.
EDIT: It doesn't even have to be expensive. I use a normal 3k desktop 720x480 and it can easily do a 2 story house
^^^ That Looks like a Galvo projecting onto the building. Not like the OP thats different.hey, this videos are cool! and i have found one more, and would like to know how strong this laser?
YouTube - BerliNeon with Tacheles Laser Streetart Berlin