Our mappings enable the stratified sampling of the solid angle subtended by oriented disk light sources (left), which can yield substantially lower error than traditional uniform area sampling (right). With 256 samples/pixel our tabulated radial map yields a noise-free image, while area sampling suffers from a significant amount of noise. This scene, rendered in Arnold, showcases many production features, including high-resolution texture maps, fur, displacement, subsurface scattering, indirect surface and volume-to-surface light transport. In such scenes the higher cost of our method has a negligible impact on the total rendering performance.