Editing Depth perception (section)

=== Lighting and shading ===
{{main|Lighting|Shading}}
The way that light falls on an object and reflects off its surfaces, and the shadows that are cast by objects provide an effective cue for the brain to determine the shape of objects and their position in space.<ref>{{cite book |last=Lipton |first=L. |year=1982 |url=http://www.stereoscopic.org/library/index.html |title=Foundations of the Stereoscopic Cinema – A Study in Depth |location=New York |publisher=Van Nostrand Reinhold |page=56}}</ref>