3dRender.com : Glossary : Cheating

Cheating - Changing or enhancing your lighting in ways that are not motivated by existing light sources. For example, we would say "I cheated that fill light brighter than it really would have been, in order to call attention to the characters entering the woods." Or "We cheated the exterior light more blue during the scene when the character is crying by the window." Or "Having the monitor image reflected in the character's glasses is a bit of a cheat, but it helps the audience know what he is reading."

Source: Digital Lighting & Rendering by Jeremy Birn, definition and 3D images adapted from the book by permission.  This page © 2002 by Jeremy Birn.