Grit in the game (Red Dead Redemption 2)

There is an incomprehensible grain on the hair, mane of a horse, tail. Even when shadows fall, the same appears (for example, when you put on a hat, a shadow falls from it and the whole face is grainy). I played for a long time with anti-aliasing, tried TAA medium, high, MSAA, FXAA (in the end I left high TAA and sharpness for the whole). I changed the scaling, but the grain remained. I put soft shadows on ultra, everything is the same. It can be seen especially well when driving. It becomes more or less when you completely remove anti-aliasing, but the picture is just awful, too sharp. Is that how it should be?

GTX 1060 6GB
AMD Ryzen 5 2600
RAM 16GB