Adaptive Shadow Testing for Ray Tracing

Publication Type

Conference Paper

LBNL Report Number

LBL-30647

Abstract

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.

Conference Name

1991 European Rendering Workshop Conference

Year of Publication

1991

Call Number

LBL-30647