Abstract: Light contribution information can be determined and cached for use in rendering image frames for a scene. In at least one embodiment, a spatial hash data structure can be used to split the scene into regions, such as octahedral voxels. Using cast light rays, an average light contribution can be computed for each individual voxel. Those light values can then be used to build a cumulative distribution function for each voxel that can be used to select which lights to sample for a given frame during rendering. The sampling for a region or voxel can be based at least in part upon the number of contributing lights for that region, as well as the relative contributions of those lights. Such an approach can be very bandwidth and cache efficient, while providing high image quality.

Abstract: Light contribution information can be determined and cached for use in rendering image frames for a scene. In at least one embodiment, a spatial hash data structure can be used to split the scene into regions, such as octahedral voxels. Using cast light rays, an average light contribution can be computed for each individual voxel. Those light values can then be used to build a cumulative distribution function for each voxel that can be used to select which lights to sample for a given frame during rendering. The sampling for a region or voxel can be based at least in part upon the number of contributing lights for that region, as well as the relative contributions of those lights. Such an approach can be very bandwidth and cache efficient, while providing high image quality.

Abstract: Light contribution information can be determined and cached for use in rendering image frames for a scene. In at least one embodiment, a spatial hash data structure can be used to split the scene into regions, such as octahedral voxels. Using cast light rays, an average light contribution can be computed for each individual voxel. Those light values can then be used to build a cumulative distribution function for each voxel that can be used to select which lights to sample for a given frame during rendering. The sampling for a region or voxel can be based at least in part upon the number of contributing lights for that region, as well as the relative contributions of those lights. Such an approach can be very bandwidth and cache efficient, while providing high image quality.