ambient lightingLight that comes from all directions. Contrast with "directional lighting," which is made up of a light source with parallel light rays that do not diminish with distance. Also, contrast with "positional lighting," in which the rays are not parallel, but diminish in intensity from the source.
|Primary Light Sources|
|Ambient lighting comes from all directions, while directional and positional lighting come from one source. (Image courtesy of Intergraph Computer Systems.)|
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Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
Lighting, predominantly from a preferred direction, which provides illumination on the work plane or on an object.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.