Rendering smooth results from one ray-per-pixel: SVGF

Serengeti (Rhino WIP) Rendering WIP
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I ran across this a couple years, don’t remember if I shared it!

Basically an algorithm that can take a noisy (rendered) image and make it quite smooth looking, even temporally (very little flickering in an animation). The interesting bit starts about 1 minute in. I’m sure it has drawbacks, but the results are quite impressive with only one ray-per-pixel.

Has any attention been given to this? It certainly is not perfect, but might make the Viewpoint preview a bit cleaner.

https://drive.google.com/file/d/0B6eg_ib7k4PoaVhWN3VYRHo0NDQ/view (actual video from paper)

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Of course all the GPU renders, including Cycles now I think, have AI denoising, with algorithms from Nvidia or Intel. I don’t use it myself much, it tends to smear out any textures with fine detail.