Figure ground ambiguity is the visual illusion with two alternate viewpoints. This is similar to figure ground reversal, but the alternate image creates a totally different perception. In this version of figure ground, a pair of objects share a similar edge. This illusion is created by the inversion of figure and ground. A well-renowned figure example is Rubin’s Vase, developed by psychologist Edgar Rubin. In this image the black positive space forms two faces that appear to be ready to kiss, and the inverse negative space forms a vase. Visually the concentration on either the white or the black makes the illusion alternate between the vase and the faces.