Yes, I changed the IPD too, but, as I said, it is not a problem of being unable to focus correctly with my eyes. Everything closer than the horizon is rendered correctly, and in all other games there is no problem with the background. It looks as if the background is represented differently by the engine or something. Changing separation and camera height looks like moving the background elements around in a 3d editor – they look completely detached from the rest of the game world. Does it work normally on your system?