Experimenting with a multi-level cache for high-frequency effects based on my previous work for SPWI surface GI (left). Specular effects like caustics scale in 2D on surfaces.
Also researching solutions to angular aliasing and flickering of depth-upscaled probes (right). No TAA.
An extension of Radiance Cascades global illumination to support complex transmissive and reflective light transport, including diffuse and specular reflection, refraction with dispersion, caustics, and subsurface scattering.
Left: U-HRC (32^3), Right: spectral path tracer