/ˌæn.əˈmɔːr.fɪk/

Anamorphic

adjective · perspective & optics

What it is

An anamorphic image is stretched, sheared, or wrapped so that, seen head-on, it looks smeared and unreadable. Move to the intended viewpoint — an oblique angle at the edge of the picture, or a cylinder of polished metal placed on the image — and the distortion cancels out, resolving into a normal-looking picture. The effect is a controlled abuse of perspective: the artist plots the image onto a grid that has itself been distorted, so that the distortion of the surface undoes the distortion of the drawing exactly at one station point.

There are two common families. In oblique anamorphosis the image is correct from a steep side angle, as with a design painted long and shallow across a floor. In mirror (catoptric) anamorphosis a curved reflector reconstitutes the picture. Both rely on the same principle as ordinary grid transfer — plotting an image cell by cell — but onto a grid that has been geometrically warped.

Etymology

The word comes from the Greek ana- ("back" or "again") and morphē ("shape") — literally a shape formed back, or re-formed, at the correct viewpoint.¹ The best-known example is the elongated skull stretched across the foreground of Hans Holbein the Younger's The Ambassadors (1533), which snaps into a recognisable death's-head when the painting is viewed from a sharp angle at the lower left.²

Examples in use

A street artist chalks an anamorphic drawing on pavement so that, photographed from one marked spot, a flat design appears to plunge into a three-dimensional hole. A stage designer paints anamorphic scenery that reads true only from the audience's seats. A perspective student studies Holbein's skull to understand how a warped grid encodes a single station point. Grid Maker Pro's overlays cover ordinary linear perspective grids rather than anamorphic ones, but the underlying idea — a grid that maps a subject onto a surface — is the same family of thinking.