Global illumination in sparse voxel octrees

Abstract This paper enhances the voxel-to-voxel radiance shooting, propagation, and scattering algorithm of Max [20]. It reduces memory requirements by storing only on occupied cells a sparse voxel octree sampling 24 propagation direction bins instead 96 or more. gives modification to compensate for larger solid angle allows position-dependent fully anisotropic scattering. For volume $$n^3$$ n 3 voxels, computation time is $$O(n^3(\mathrm {log}\,n)^{3/2})$$ O ( log ) / 2 .