XR · AR · VR.

Take any digital scene. Now anchor it to the real world so it doesn't drift when you turn your head. That's the whole job of extended reality. The "extended" part is doing two hard things at once: understanding the world (where am I, what's a surface, where are my hands) and drawing into it (what should be visible, lit how, occluded by what).

The umbrella term breaks into three flavors. VR replaces your view entirely — a headset shows you a built world. AR overlays virtual content on top of the real one — a phone, glasses, or pass-through headset. MR blends them so virtual objects respond to real geometry — a virtual ball that bounces off a real table.

Underneath all three is the same engineering challenge: track the user, render the scene, composite the result, do it again sixty times a second, and never let the latency creep above twenty milliseconds — because past that, your stomach knows something's wrong.