Cel Shading is a style of computer rendering that imitates the look of hand-drawn artwork and animation. In layman's terms, it replaces the shading gradient of conventional rendering with flat colors and shadows (as seen at right). The style was pioneered with the Sega Dreamcast game Jet Set Radio, the first game to use 3D polygons to produce a cartoony look. The name comes from the cels hand-drawn cartoons were traditionally painted on to. Chiaroscuro is an oft-used visual effect. Examples of Cel Shading include: