For those of you using the Epic Games version of SOTTR, I just followed this guide from a pinned comment on Nexus Mods and got it working:
Link to pinned comment:
https://www.nexusmods.com/shadowofthetombraider/mods/114?tab=posts
I reposted the pinned comment here:
"Got it working on Epic after some attempt. Pretty simple. First download global injector. Download Special K - Development / Version History - Special K Discussion (differentk.fyi).
Link to Special K:
https://discourse.differentk.fyi/t/download-special-k/1461
The archive version. Then look for a file named "SpecialK64.dll". Rename that file to dxgi.dll and drag it into the root folder of tomb raider. Launch the game to test it, make sure to have dx12 disabled, press ctrl, shift, backspace at the same time and a menu should open up. If your screen is not black then it means it works. Simply close out the game, download this mod. Make a new folder in the root folder of tomb raider. Name it SK_Res. Inside that folder make a folder named inject . Inside of that, make a folder named textures . Then simply drag the loose texture files from the mod u downloaded into the textures folder. In my case I dragged all the files inside "1) Nude and tats (main textures)" into the textures folders. After that, launch the game like normal and all should work"