Using several pieces of A.I-based upscaling software, a modder has upscaled about 15,000 textures used in Fallout: New Vegas. The textures have a 4x upscale (2x horizontal, 2x vertical), giving New Vegas a sharper, cleaner look. This isn't the first instance of a mod team using A.I to upscale textures; Final Fantasy VII received an upscale mod earlier this year.
https://www.notebookcheck.net/Almost-15-000-textures-in-Fallout-New-Vegas-get-a-facelift-thanks-to-A-I.419238.0.html