So this just started happening to me tonight. I was playing the game hours ago and it was totally fine. Basically, any 3D rendered area of the game is just a black screen. All 2D things (UI, login, load) are displaying just fine. Anything that would be rendered in 3D is black. After extensive searching I found that some people fixed this by editing their UserSettings.txt file. None of this fixes worked for me. So I just deleted the file all together and it worked. However, when I try to start the game again after closing it once the problem persists. So I have to delete UserSettings.txt every single time I want to play or get disconnected. Then I have to accept all the terms and set everything up again.
I had no windows updates, no game updates, no driver updates, and no settings changed before this started happening.