I realize the Plenoxels paper is already mentioned by the author, but 2 Minute Papers does a great overview of the concepts (for those wondering what makes this different from other techniques)<p>Here's the NeRF paper (2020)
<a href="https://www.matthewtancik.com/nerf" rel="nofollow">https://www.matthewtancik.com/nerf</a><p>And the more recent Plenoxels explainer (2022)
<a href="https://www.youtube.com/watch?v=yptwRRpPEBM" rel="nofollow">https://www.youtube.com/watch?v=yptwRRpPEBM</a><p>The original NeRF's novelty was the neural-net used to extrapolate the final images, but the newer paper shows that that's not really necessary. My understanding is that the secret-sauce is the 5D 'plenoxel'.