Occlusion is an exciting feature that can be used for dozens of things. Why not
add a hidden virtual room inside your packaging?
let virtual objects com out of the floor?
make your avatar come out of a hidden room beneath your business card?
and much more.
Occlusion
Occlusion is exactly what it sounds like; the ability to occlude, or hide, something beneath or behind something else.
In Augmented Reality a common use case could be making your real-life packaging have secret hidden rooms and compartments where objects, characters and videos come into view behind a virtual lid or doorway.
Adding Occlusion to your AR Scene
First of all, set the ground plane as an occluder and then add a virtual hole to the ground plane:
Check the box that says "Show the ground plane in the editor".
Check the box that says "Occlude objects beneath ground plane".
Click "+ Add a hole in ground plane".
Now that you have added a hole in the ground plane, you can add a 3D object below the hole, so that it is only visible when looking into the hole:
You can now preview your Hololink and see that the whole astronaut is only visible when viewed from above.
The best effects are created when adding walls and a bottom to a hole or, as in the first gif, adding animation so that an object is lifted out of the hole as if on an elevator.