• Matt Pharr's avatar
    Add Russian roulette to GridDensityMedium::Tr(). · bbf70b6a
    Matt Pharr authored
    When the transmittance gets low, we start to randomly terminate the
    transmittance computation. Speeds up rendering of the smoke/sphere scenes
    by roughly 10% and reduces the average number of steps through the grid
    from ~26 to ~13 for those scenes.
    bbf70b6a
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