Since upgrading my computer this past summer, I have not seen any rain or blood spray in the game. When I’m in the keep and it should be raining, I hear the rain, but walking around any of the outside portions of the keep, I see no rain.
Also, on mission, when killing rat men and north landers, as one does, I see the blood on the ground and on my camera, but this is no blood spray from the enemies I kill. And very recently, on Against the Grain, I came up against an invisible wall during a boss fight. After I died my friend informed me that I was running into a green wall of fire that I could not see.
My graphics settings are custom and optimized using GeForce Experience. I using a Ryzen 5 2600X CPU and GTX 1080 GPU. If anyone knows any settings I might try tweaking to fix this problem, let me know. Blood and Gore are on, and Particle Quality is set to Extreme.