On Sun, 10 Oct 1999 15:43:41 -0400, Greg M. Johnson wrote:
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>Here are images which document the difference between pointlight and
>spotlight interactions with atmospheric media.  If that's the way it's
>supposed to be, then so be it. This difference is quite annoying to me
>as it goes against my intuition that point and spot lights should be the
>same kind of animule, just different in their directional coverage.

Try adding this line at the end of your scene:

cone { 0, 0, 600*y, 50 pigment {rgbt 1} hollow}

See my posting from a couple weeks ago on why this has the effect it
does.  (povray.general, I think.  Something about media tutorials or 
such.  Maybe someone could post a more complete reference?)

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