I saw some video from Magic Leap some time ago, some animated character got behind the chair in augmented vr. Aren't they just using infrared to get distance to

I saw some video from Magic Leap some time ago, some animated character got behind the chair in augmented vr. Aren't they just using infrared to get distance to object, then they are using ML to classify and distinct them all, then when they have sizes of object they calculate behind which element their character will be so they can position it good and make parts of it transparent while crossing under the chair?