VisualFunHouse

3D Concave Monkey Optical Illusion is a an illusion shot by mrettig.  This is a classic example of the Hollow Face Optical Illusion. Due to the back lit lighting this monkeys face appears to be 3D and popping out at you. In fact it is actually a convex shape, and the photo is taken looking into the back of the mask where your face would normally go. For a demonstration of exactly how this illusions works check out the Hollow Face Video Optical Illusion.