Dynamic Diffuse Global Illumination Resampling

Interactive global illumination remains a challenge in radiometrically and geometrically complex scenes. Specialized sampling strategies are effective for specular near-specular transport because the scattering has relatively low directional variance per event. In contrast, high from paths comprising multiple rough glossy or diffuse events notoriously difficult to resolve with small number of samples. We extend unidirectional path tracing address this by combining screen-space reservoir resampling sparse world-space probes, significantly improving sample efficiency contributions that terminate on events. Our experiments demonstrate clear improvement—at equal time quality—over purely traced probe-based baselines. Moreover, when combined commodity denoisers, we able interactively render