|Title||Adaptive Shadow Testing for Ray Tracing|
|Publication Type||Conference Paper|
|Year of Publication||1991|
|Authors||Gregory J Ward|
|Conference Name||1991 European Rendering Workshop Conference|
We present a simple technique for improving the efficiency of ray tracing in scenes with a large number of light sources. The sources are sorted according to their potential contribution, and only those sources whose shadows are above a specified threshold are tested. The remainder are added into the result in proportion to a statistical estimate of their visibility. The algorithm requires very little storage, and produces no objectionable artifacts.
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