Path: utzoo!attcan!uunet!lll-winken!csd4.milw.wisc.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!oakhill!val!aubrey
From: aubrey@val.UUCP (Aubrey McIntosh)
Newsgroups: comp.graphics
Subject: Re: 3-D perceptual abilities
Message-ID: <289@val.UUCP>
Date: 1 Mar 89 18:50:11 GMT
References: <2492@masada.cs.swarthmore.edu>
Reply-To: aubrey@val.UUCP (Aubrey McIntosh)
Organization: Video Associates Labs - Austin, Tx
Lines: 32

In article <2492@masada.cs.swarthmore.edu> annie@cs.swarthmore.edu (Annie Fetter) writes:
>I have had this happen to me many times, but never with "solid" objects.  I
>often get the 3D depth effect when looking at chain-link fences, nets, and
>other '2D' repeating patterns of that nature.  I can often reach out and put
>my hand into this 'world' and it's a really disturbing, though nifty, effect.
>
>I can't really cite any common factors which have brought this on, except 
>perhaps daydreaming...
>	
 
I've been interested in stereo vision since I had a stereo vision viewer
as a child, and often I have taken 'stereo' photographs by moving a foot
or so and snapping a second photograph.

I've learned to view the 3-D molecular drawings in journals, such as the
Journal of Inorganic Chemistry, very fluently.

What I have noticed happening is that, while in a photographic darkroom,
when I first turn on the lights and there is an absence of orientation and
visual cues, I 'lock on' to the stippling patterns on the wall incorrectly,
and I have a feeling of vertigo and of being cross-eyed.  This incorrect 
orientation usually is difficult to resolve, and almost always requires
touching the wall and then focusing on the tip of my finger.

oakhill!val!aubrey%cs.utexas.edu

    

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