Cel shading (often misspelled as 'cell shading') or
toon shading is a type of
non-photorealistic rendering designed to make 3-D
computer graphics appear to be flat by using less shading color instead of a
shade gradient or
tints and shades. Cel-
shading is often used to mimic the style of a
comic book or
cartoon and/or give it a characteristic paper-like texture. There are similar techniques that can make an image look like a sketch, an oil painting or an ink painting. It is somewhat recent, appearing from around the beginning of the twenty-first century. The name comes from
cels (short for
celluloid), the clear sheets of acetate which are painted on for use in traditional 2D animation.