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Shadows help ground images (e.g. characters in games seem to float without contact shadows). Seems simple, but requires a 3D model of the room to work properly. LiDAR

Lag between reality and virtual would be noticable side-by-side, no matter how much the "R1" chip reduces lag (12ms)... Ah! they might do the Guitar Hero trick, and delay the reality feed by the same amount, so they are exactly syncronized... see-through AR (like google glasses) can't delay reality.

The outward display of reverse faux-transparency is a nice touch, displaying a fuzzy image of the wearer's eye on the front. (Though not sure what to make of the back-side of the displayed image - could a user ever see it?)

I think this is the first major Apple developmemt without Jobs' involvement?



"lag" of 12ms is good enough - less than one frame of 60fps. it's 1 frame of 83 per second. should be good enough.




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