Julian Beever is an English artist who specializes in creating trompe-l'œil chalk drawings. He uses a projection technique called anamorphosis to create the illusion of three dimensions when viewed from the correct angle. It's often possible to position a person within the image as if they were interacting with the scene. Trompe l'oeil means 'trick of the eye' in French. The effect is so convincing, people will swerve to avoid potholes he's drawn in the pavement! But just how does he do it? In his own words: "The secret is to set up a camera on a tripod and keep it in one spot and check every mark you make.  It's really just playing with perspective to make it appear different to what it really is." Keep in mind, what you're about to see is all done on flat surfaces! As always, let us know your favorite in the comments below. I think mine is the elaborate under-street cross-section showing the plumbing, etc.