I've done some experimenting with this. If a window is in focus, it occludes real-world objects, even those that are in front of the window. The real-world obje

I've done some experimenting with this. If a window is in focus, it occludes real-world objects, even those that are in front of the window. The real-world object becomes maybe 5% visible, so you can just barely see it. If the window is not in focus (like if you're not looking directly at it), then it goes 50/50 with real-world objects, so any real object in front of it becomes sort of a "ghost" in order for you to still be able to see the window. It never tries to occlude apps behind real-world objects, except for your hands, which do full occlusion, as shown in the video.