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.
BT - 1991 European Rendering Workshop Conference C1 -Lighting Systems Group
C2 - LBL-30647 CN - LBL-30647 LA - eng N2 -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.
PY - 1991 T2 - 1991 European Rendering Workshop Conference T3 - 1991 European Rendering Workshop Conference TI - Adaptive Shadow Testing for Ray Tracing ER -