Here's the address to my links page with spectrar.inc there, if that's what is 
mentioned below:

  http://members.aol.com/inversez/index.html

There's an example picture near the bottom, click on that.
Daren Wilson was the reference for making it. He already had a working script 
which produced a good example of the spectral dispersion effect. I added more 
colors to blend and used proxy real-world wavelengths for the spectral 
characteristics (none of this is science, by the way, in the sense that 
POV-Ray is not pure physics-based in the department of light to begin with 
from what I understand, rather the product of realism is probable if enough 
additions were to be used to sort out the rough draft of the ray-tracer). I 
tried for reflection color dispersion too and only got an intolerably slow 
render, no reflection changes visible.
This does NOT work in POV-Ray 3.1*, even with semi-colons ;)

Message <3652cabc.0@news.povray.org>, Ron Parker typed...
>
>On Wed, 18 Nov 1998 00:40:30 -0000, Rick <kit### [at] dialpipexcom> wrote:
>>Are we talking refraction here, ie splitting light into its componat colors?
>>
>>I tried this a whil ago, and failed to achive results, can this be
>>simulated? - without texture maps which kinda defeat the object?
>
>It can be simulated, but only on direct viewing through the prism or 
>other transparent object.  In other words, you won't be able to do
>the album cover from "Dark Side of the Moon".
>
>There's a fairly good treatise on modifying POV 3.02 to do dispersion
>effects at http://www.newcolor.com/darenw/dswpov/disp.html , though I
>wouldn't recommend trying it unless you're relatively familiar with 
>the guts of POV.  There's also an include file somewhere that simulates
>dispersion, also for version 3.0x, but I don't have a URL for that 
>handy.

-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/POVring.html
=Bob

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