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From: mcdonald@aries.scs.uiuc.edu (Doug McDonald)
Newsgroups: comp.graphics
Subject: Re: PoolTable Turing Test Photo
Message-ID: <1991Jan26.144101.27840@ux1.cso.uiuc.edu>
Date: 26 Jan 91 14:41:01 GMT
References: <15115@celit.fps.com> <7926@castle.ed.ac.uk> <28220@cs.yale.edu> <1991Jan25.142659.3914@jarvis.csri.toronto.edu>
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In article <15115@celit.fps.com> billd@fps.com (Bill Davidson) writes:
>In article <1991Jan25.142659.3914@jarvis.csri.toronto.edu> stam@dgp.toronto.edu (Jos Stam) writes:
>>I wouldn't mind seeing more dirt in computer generated images, just for
>>the sake of variety. By analogy, figurative art is not only restricted to 
>>hyperrealism.
>
>The pool table picture was an attempt at photo-realism; something we
>are getting closer to but can't quite do.  It was an extremely good
>example (especially for 1984) though it attacked something that was
>relatively easy (spheres and green felt).  

> In many professionaly
>produced pictures of shiny spherical objects, the camera lens is
>retouched out or obscured by other reflections around it (you can't
>shoot it without the reflection; it's impossible).


But you can come arbitrarily close: take the picture through a 
neutral density filter whose front surface reflects onto a large surround
of black felt. And put the camera in the dark. A 10 percent transmission
filter works well. 

Doug McDonald