try going to settings>graphics and turning the grass performance down
sorry about that, there is one last thing that could work, but it would compromise the visuals of the game (and might be buggy). If you go to the windows search bar and type "%appdata%" you can go to Local>Ato>BETAv0config.
If you edit the line that says shaders="1.000000" and change it to shaders="0.000000" that might turn off the effects.