Performance tweaks for unmodded game, if you struggle on high resolution
Reasonable minimum GPU for this mod on 4k display is 1070. That´s what i have. BUT still you will not have always 60 fps..
Best results with Gtx 1080 or equivalent. Ofcourse you need some CPU power too. I have Ryzen 3600, but i think it will run with Ryzen 1600 or equivalent also.
Installation:
Unzip and place to root folder of the game where system.cfg is.
Add +exec user.cfg to launch options of your game
Best results with with Friendly HD textures config mod
Update: Big shadows performance improvement