2008

Final Gathering (mental ray Renderer)
Final gathering is an optional, additional step to calculating
global
illumination
on page 6072 . Using a photon map to calculate global illumination
can cause rendering artifacts such as dark corners and low-frequency variations
in the lighting. You can reduce or eliminate these artifacts by turning on final
gathering, which increases the number of rays used to calculate global
illumination.
Scene rendered with global illumination but no final gather
7782 | Glossary