Optical illusion in black and whiteThe black and white optical illusion is a black and white spiral. The vortex is made of a variety of shapes and sizes, and appears to move in a circular motion. It creates an optical illusion because of the way shapes and sizes are arranged in the image. Shapes and shadows are used to create interesting visual effects. For example, larger, darker shapes appear to be moving forward, while smaller, darker shapes appear to be moving backward.