Plato’s famous "Allegory of the cave" said that the whole world is given to us only in the shadows of real objects on the walls. This point of view is called individualism - each of us sees a unique picture. 

Current work refers to this phenomenon. The projection on the wall is clear for only one person at a time. The illusion jumps out of the virtual world into the real one, adding non-existent virtual content to the physical object.