The way this technique works requires a number of preferably powerful projectors to project images onto any desired surface. The surface can be anything, from a building to a small box to a person. For the images to be what you want and to hit exactly the areas you prefer, this object first needs to be mapped into a computer. This is accomplished by taking a photo of the object (let’s say a building) from the exact position of the projector, scanning the picture in and creating “masks” in Photoshop or similar programs of the areas you’d like to play with. The actual manipulation is then accomplished in another special computer program, which at this point can even be loaded onto an iPad.