Hi, I'm working with William on this project, so I can provide a little more detail. We're trying to use object tracking to track handheld objects, but are running into issues where grabbing an object can sometimes occlude it, causing it to no longer be tracked. If a user picks up an object and moves it while occluding it, the object tracker will still report the object as being in the original spot, without giving any indication that it is no longer actually seeing it. We were considering getting around this by adding a check whereby if an object loses tracking while being close to the user's hand, it is assumed to be grabbed, and the digital visual can be parented to the hand; however, there is no way to actually tell whether an object has been occluded because the tracker just keeps sending updates on the last-seen position. In summary, it would be useful to be able to know when an object is occluded/out of view, because then the app knows the reported position may not be accurate and can take measures to ensure the digital representation is not too far removed from the real one. I have opened a feedback post here: FB15752077 (Object Tracking should indicate when a tracked object is occluded / not currently in view)