Using Kaldaien's Special K to disable shaders and achieve better performance.
Screenshots are on the lowest settings from the settings menu and 1600x900.
Credits to the people who found these shaders! I'm just posting this here so it's easier to find.


How to use:

Download SpecialK (latest nightly build from their discord) and drop SpecialK64.dll into your game's folder (where the .exe is located). Rename it to dxgi.dll.
You can also download it from their site or discord: Special K.

Launch the game and press Ctrl+Shift+Backspace and enable D3D11 Deffered Mode. Close the game. Download the .ini file and place it inside the game's folder. It is disabling many things like fur and grass. Open it and you should see something like:

b5627367=Disable 
;Grass Shaders

The "b5627367=Disable" is the shader to be disabled and the ";Grass Shaders" is a comment so as you know what that shader does. In order to use this you should delete every comment and only keep the shadername=disable. After deleting the comments and keeping whatever shader you want disabled save it and launch the game.

Some shaders are commented out with a ";" cause they may cause problems. You can use them by removing the ";" but make sure to read what they are doing.


Enjoy!

Specs:
3200g Radeon 8
Crucial Ballistix 16 GBs 3200Mhz