Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!decwrl!sun!imagen!atari!portal!cup.portal.com!Michael_J_Ward From: Michael_J_Ward@cup.portal.com Newsgroups: comp.graphics Subject: Re: 3-D perceptual abilities Message-ID: <15313@cup.portal.com> Date: 3 Mar 89 07:16:15 GMT References: <4230@mtuxo.att.com> Distribution: na Organization: The Portal System (TM) Lines: 12 With all of the discussion of 3-D perception on the net lately, I wonder how many people see the effect I notice when looking at complex images of solid primary color patterns, wherein one color is apparently floating above another? I have always assumed it was due to bad eyesight (though it is still there when fully corrected), astigmatism (ditto) or color-sensitivity variations (one eye sees things somewhat more reddish than the other, and always has). It seems likely to me that the brain is interpreting some visual clue from the color differentiation to mean that the colors are at different distances. It is also true that the different colors will focus at different distances in the back of the eye, but I never thought that difference was large enough to cause this effect.