Okay so this was another accidental thing that happen which I call "The Land Of Narnia"
READ THE STEPS BEFORE YOU SAY ITS OLD
This is a texture glitch in which the game believes that you are still falling out of the earth, and the textures do not want to load, which you will see in the upcoming video.
So first things first, go to this location on the map.
Second, line up your car (Preferably a fast car such as a Bugatti) to where you can launch off a runway sort of thing.
Third, go full blast and drive to where you see the subway tunnels. If done correctly, you should land in the tunnels, no textures loaded. It should be trippy.
Watch the GIF:
The textures start loading when you drive out of the tunnel or if you you go to the second subway station by the Del Perro Heights Apts.
More photos will added soon.
If you have a friend and he/she gets out of the car and his/her textures load, then they will be invisible (on your screen) until they get in the car.