This may be too obvious, so guessing this has not been overlooked.
You're using a multi-colored background (or multi-gray shades) aren't
you? You at least need a gradient or 2-tone object or sky showing in the
refracted part of the object so the colors may divide. At least this is
the way the non-patch way works.

Ken wrote:
> 
> Dear Mike,
> 
> I have tried repeatedly to repeat the sphere you have on the splash
> screen of this patch and regardless of the setting I try I am unable
> to achive any colored dispersion what so ever. This is also true of
> other shapes and settings. Would you be so kind as to provide an
> example of working code so that I may learn by your example.
> 
> Thank you for your continued support.
> 
> --
> Ken Tyler
> 
> tyl### [at] pacbellnet

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

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