ML based denoising for various ray tracing applications is a hot topic at SIGGRAPH this year. Here's one NVIDIA paper on the topic from last year: http://resear

ML based denoising for various ray tracing applications is a hot topic at SIGGRAPH this year. Here's one NVIDIA paper on the topic from last year: http://research.nvidia.com/sites/default/files/publications/dnn_denoise_author.pdf http://research.nvidia.com/sites/default/files/publications/... There are also some impressive new non ML based denoising results too however and it's unclear to me at the moment where NVIDIA is using ML based denoising and where they are using more traditional filters in the demos they've been showing. I think at least some of the real time ray traced ambient occulsion and soft shadow demos have been using more traditional non ML based filtering approaches.