From: quasar@neuromancer.leis.bellcore.com (Laurence R. Brothers)
Subject: Re: More on Classifying VR
Date: Sun, 24 Feb 91 23:48:52 GMT
Organization: Bellcore, Piscataway, NJ



There are no display devices that I am aware of for which the user 
cannot distinguish between reality and the display, (except maybe
windows, mirrors, and other optics which directly relay real images,
and which I refuse to count....). 

Certainly 30 hz will never be enough to fool anyone. I can see the flicker
at 30 hz if I look for it! And no matter the number of hz, and the resolution
of the display, there are lots of other things you'd need before you
could pass your "turing test". Conceivably current display devices might
briefly fool someone who wasn't looking for it, say a back-projected video
image in place of a window, but if you actually had a window and the film
strip to compare, there wouldn't be much of a problem.

Maybe Tom Furness can tell us about the latest and greatest headmounts
and HUD displays, but I'll be skeptical until I get a demo which fools
me....

-- 
                 Laurence R. Brothers (quasar@bellcore.com)
      Bellcore -- Computer Technology Transfer -- Knowledge-Based Systems
       "There is no memory with less satisfaction in it than the memory
            of some temptation we resisted." -- James Branch Cabell