https://edit.theappbusiness.com/augmenting-the-workplace-with-arkit-f65c1f50b67a

Apple’s ARKit does a fantastic job of anchoring virtual objects in the real world. This illusion of a coherent augmented space collapses though if a real-world object passes in-between the device’s camera and the virtual object: the AR object remains fully visible onscreen with the real-world object appearing to pass beneath it, despite the real object being closer to the user.

Imagine an app that turns any surface into a whiteboard. What would happen if, as you moved through your augmented office, all your jotted-down notes continued to be visible, even if they were behind a wall, or in another room? You would quickly be faced with a confusing jumble of overlapping notes and drawings filling the visual field. How can we make these virtual notes and drawings disappear behind walls and other surfaces just like their real-life counterparts would?