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From: Hercules Gunter <hgunter@wantree.com.au>
Subject: Re: Magic-Ascii
Date: 1996/11/09
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Dr. Alfred Helmerich wrote:
> 
> Has anybody ascii designs that use the magic 3D effect?
> Or has somebody an algorithmus to create one?
> 
> Alfred

I don't have any using pictures, but the principle is very simple, as
demonstrated below.

Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  
  the    the    the    the    the    the    the    the    the   
spacing spacing spacing spacing spacing spacing spacing spacing
Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  
  the    the    the    the    the    the    the    the    the   
spacing spacing spacing spacing spacing spacing spacing spacing
Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  
  the    the    the    the    the    the    the    the    the   
spacing spacing spacing spacing spacing spacing spacing spacing
Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  Vary  
  the    the    the    the    the    the    the    the    the   
spacing spacing spacing spacing spacing spacing spacing spacing

This is the underlying principle of all wallpaper 3D art. 
Interestingly, I find that the perception of the order of the layers
depends on which line your eyes are fixating on and the number of
repeats you are overlaying.  The above has three layers, or two,
depending on which lines your eyes match, and the layering can vary (a
varying illusion), and can be viewed using either the parallel or
cross-eyed technique.

If you were to take typical ascii art objects and arrange them similarly
you would get the illusion of multiple layers by varying the repeat
factor across the page.  With a little ingenuity, and probably a lot of
frustration,  you could get objects occluding each other.

You realise you've started something now, don't you?  We're going to be
drowning in 3D asciis soon!

Hercules Gunter