Thank you! I did end up writing a developer feedback post, I tried to keep it concise. Denoising is a very wide and deep subject, because it’s about reconstructing more data out of less, to put it one way. I’m excited Epic’s made both global illumination and denoising available as plugins, so others could experiment with the most effective methods and techniques.
Speaking of techniques, new denoisers have been developed building off of SVGF, such as ReBlur and ReLax. While that probably won’t mean much to anyone not on the technical/rendering side of the work, it does mean we have technologies to achieve stable RT images at a fraction of the sample count-sometimes as low as 1/2 a ray per-pixel.
Granted, this technology overlaps heavily with Lumen, which is itself a ray-tracing system, just with a different sampling and filtering paradigm. I think path-tracing will be used when the performance is good enough to be truly practical, but I’m happy we’re on our way there.