The demo is just using high res Restir GI introduced in 2021 paper:https://research.nvidia.com/publication/2021-06_restir-gi-path-resampling-real-time-path-tracing plus some inline raytracing and SER optimization from driver side. The IQ and perf is pretty good on ADA (40)GPU. BTW, we also add reflection restir gi to compensate the missing GI on reflection, basically, character won’t be pitch black on reflection without direct lighting.