illusion art

Artists have used illusions and perception in their art for centuries. There are many examples of using perception tools such as symmetry or figure-ground. The photo shown here plays with depth perception. If you are standing at the right angle when looking at this photo it appears as though there is a river cutting through the sidewalk. However, as you change your angle and become closer to the drawing you realize that it is just a drawing. Depth perception is the ability to judge distance and three-dimensional relations. We judge these dimensions based on monocular clues and binocular clues. The elements to judging depth are relative size, texture gradient, height on plane...Artists can use these clues when creating a piece to deceive our eyes into thinking a 2D work is actually 3D, or real to life. There are many of these chalk drawings scattered thorughout the internet, many are done Julian Beever. He is a famous chalk artist who often draws these optical illusion chalk drawing for companies and other groups. This form of art continues to grow as people learn knew ways to trick the mind into perceiving new things in art. check out the attached picture to see some 3D chalk art.