In a lengthy and involved blog post, legendary engineer John Carmack has gone into detail on the problems he and the Oculus Rift team face trying to achieve the virtual reality dream. The headset-tech requires a maximum latency of about 20 milliseconds to feel like genuine head movement, Carmack said, but current systems only achieve average response times of 100 milliseconds. Carmack’s discussion of how he’s tackling this issue is technical but fascinating. Valve’s Michael Abrash has shared similar thoughts in the past.
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