I don't use beta drivers.
Attached pic of the "gray world." This definitely isn't the worst it has been but you get the idea. You can only tell where the road is by the things on and around it. You can't tell where doors, stairs, etc. are unless you are already familar with it.
As you can tell from the previous post time stamp, it got to that point in just over an hour of playing.
I think it happens quicker the more I go in and out of buildings.
If it starts looking like that pic and it decides to show a cutscene, that's when the game hangs on "Loading."