Julian Beever (born c. 1960) is an British chalk artist who has been creating trompe-l’œil chalk drawings onpavement surfaces since the mid-1990s. He uses a projection technique called anamorphosis to create the illusion of three dimensions when viewed from the correct angle. It is often possible to position a person within the image as if they were interacting with the scene.
http://www.julianbeever.net/