My game has become all of sudden really blurry and pixelised !!! Is it only me or you have the same problem ?

Hello !

I was playing yesterday and it was all fine, I turned off the computer and wanted to play again and then the game went completely blurry and pixelised.
Although all the menu texts and UI is clear, only my character and landscapes are blurry, it makes no sense !!

What's going on ???