Photon Mapping might be biased, but it's extremely easy to make it consistent by using the method outlined by Knaus and Zwicker [1]. Using that method photon ma

Photon Mapping might be biased, but it's extremely easy to make it consistent by using the method outlined by Knaus and Zwicker [1]. Using that method photon mapping will converge to the right result. Even without progressive photon mapping you can choose a photon radius that won't cause visible errors. [1] http://cgg.unibe.ch/publications/2011/progressive-photon-mapping-a-probabilistic-approach http://cgg.unibe.ch/publications/2011/progressive-photon-map...