Just some textures converted to Quake 1 palette. Some are straight conversions, some I had to chop down and use improvised methods to get them fit into 255 colours without compromising details too much.
Blog post: https://www.artstation.com/jorma_rysky/blog/2y8R/how-to-create-pixel-art-textures-from-photos-that-dont-completely-suck
Model for Deep One texture and original true colour texture: https://sketchfab.com/3d-models/fps-alone-in-the-dark-low-poly-deep-one-7d82a143a4dc4574bad072a355d295bc
Public Domain stuff including these and sources: https://drive.google.com/drive/u/1/folders/1qsD-Fj-ub_80hRRorVJy2DsYyLMmmdjs