Need help for the options (im new)

Hello , dear users. Well lets start... i have a bad pc and i play on custom setings... i check into the setings to low them small but i dont know i click something and then everything was grey
(example picture)

 

We need your computer specs.
Like this:

 

No PC specs needed here, you just turned the fog density up by accident.
Go to the "Envoirment" part of the UI, and turn down the fog density slider, like in this pic.

 

Haha, I'm an idiot, expecting it to be an issue with the graphics. D'oh!

 

@ThatGamer164 @Slammington thanks guys!!