Lookup tables for colorimetry. It's a film format used for color grading presets: https://en.wikipedia.org/wiki/3D_lookup_table

Think Instagram filters and the like (But better and much more than that). I am not certain what UIs can use them. I know Comfy does, and SwarmUI does as that is what I use. You can even diffuse into the LUT rather than in post processing and the results are spectacular. There are a couple recent pics posted to my Mister Furley model using LUTs. Super professional color grading both in diffusion and for post processing. Thank you for sharing this awesome collection @pgc