Patent ID: 7884820
Filing Date: 2011-02-08
Classification: G06T

Abstract:
1. A computer-implemented method performed by a processor unit comprising: lighting a graphical scene based on a source radiance, one or more scene reflectances, and a view direction, the graphical scene including a surface spot having a reflectance; adjusting at least one reflectance of the graphical scene; relighting the graphical scene based on the at least one adjusted reflectance of the graphical scene using an incident radiance at the surface spot that is separated into respective incident radiance components corresponding to different respective numbers of interreflections in the graphical scene, the act of relighting comprising using precomputed transfer tensors (PTTs) to relate the incident radiance components along a path to a first component, the source radiance and a second component, where the first component and the second component represent a global illumination along different light paths that arrive at the surface spot; and interactively rendering the graphical scene with relighting conditions, the view direction, and the at least one adjusted reflectance.