Mirror anamorphosis, also called catoptric anamorphosis, is a technique in which a radically distorted image painted or printed on a flat surface reconstructs into its true, recognisable form only when reflected in a curved mirror, most often a cylinder placed at the centre of the image. The viewer looks at the mirror, not the flat original, and sees the resolved picture appear on its curved surface. It works because the flat distortion is the precise mathematical inverse of what the cylinder's curved surface does to light. The image is wrapped and stretched around the mirror using a polar mapping; the reflection unwraps it. Get the geometry exactly right and a smear of paint becomes a face. For Jonty Hurwitz, mirror anamorphosis is a signature method, and the cylindrical mirror is not an accessory but an integral, inseparable component of the finished sculpture: the artwork only exists in the moment of reflection.