Diffuse Global Illumination

Photons can be used to bounce energy around the diffuse surfaces in your scene. This approximates the ambient light bounce that we've been faking with our fill lights up until now. Each bounce of a photon off a diffuse surface will impart some of the color information of the surfaces it contacts.

This is set up in the light the same way we did for caustics.

scene files (RMB click to "Save As...")
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