Editing Rendering (computer graphics) (section)

=== Visual perception ===
Though it receives less attention, an understanding of [[human visual perception]] is valuable to rendering. This is mainly because image displays and human perception have restricted ranges. A renderer can simulate a wide range of light brightness and color, but current displays{{snd}} movie screen, computer monitor, etc.{{snd}} cannot handle so much, and something must be discarded or compressed. Human perception also has limits, and so does not need to be given large-range images to create realism. This can help solve the problem of fitting images into displays, and, furthermore, suggest what short-cuts could be used in the rendering simulation, since certain subtleties will not be noticeable. This related subject is [[tone mapping]].