Change Details

{D10594} adds support for light spread to area lights. However this can be noisy for low angles, especially noticeable when the light is near a surface or inside a volume. We could compute a virtual shading position closer to the light, and do solid angle importance sampling as if the shading position was closer. We'd need to find a good heuristic to relate the distance and light spread angle.

{D10594} adds support for light spread to area lights. There is basic importance sampling for rectangular area lights, based on finding the subset of the area light that actually affects a shading point. But still missing: * Importance sampling for disk/ellipse light. * Take spread into account for volume equiangular sampling.

{D10594} adds support for light spread to area lights. However this can be noisyThere is basic importance sampling for low anglesrectangular area lights, especially noticeable when thebased on finding the subset of the area light is near a surface or inside a volumethat actually affects a shading point. We could compute a virtual shading position closer to the light, and do solid angle importance sampling as if the shading position was closer. We'd need to find a good heuristic to relate the distance and light spread angleBut still missing: * Importance sampling for disk/ellipse light. * Take spread into account for volume equiangular sampling.