Tune this to tune the trade-off between light quality and speed. The default value was tuned by hand on very shiny light sources. Too high and processing becomes very expensive. Too little and the ligth decay doesn't feel natural.
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Tune this to tune the trade-off between light quality and speed. The default value was tuned by hand on very shiny light sources. Too high and processing becomes very expensive. Too little and the ligth decay doesn't feel natural.