A lightcast is a functional analysis and mapping of the illumination produced by a light source. It is used to map the physical characteristics of light emission for use in functional systems. A lightcast includes the entire zone of illumination while a raycast measures lighting of a single point in space near the light source. A lightcast is typi...
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http://en.wikipedia.org/wiki/Lightcast
(līt´kast) trademark for a fiberglass bandage that is used instead of a plaster cast. Lightcasts harden very quickly, weigh significantly less than plaster casts, and are water resistant.
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http://www.encyclo.co.uk/local/21001
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