Street Painting, 3D Pavement Art, 3D Chalk Art, or 3D Sidewalk Art, they are a form of Anamorphic Perspective. Anamorphism is usually considered a form of Illusion or Trompe l'oeil... with the aid of computer programs) replicate the illusions. Today, artists like Julian Beever, Manfred Stader, Edgar Muller and numerous other artists create 3 Dimensional Pastel... they are called Street Paintings, Chalk Paintings, Sidewalk Paintings or Pavement Art, if they have a Three-Dimensional Illusion they can be traced back to Kurt Wenner's anamorphic pastel...