On Fri, 26 Jul 2002 18:47:15 -0500, Christopher James Huff wrote:
> In article <3d41d1fb$1@news.povray.org>,
>  "Apache" <apa### [at] yahoocom> wrote:
> 
>> Not sure about that, remember the "god's fingers" situation when light
>> crawls through small openings in dusty/smoky areas?
> 
> That is not due to beam divergence, it would happen with truely parallel 
> light. It is caused by perspective: the rays come through the clouds at 
> a distance and pass to each side. If the sun was close enough for 

And in fact, on particularly good days you can see convergence on the 
other side of the sky as well; APOD has had a few examples of this 
phenomenon. 

-- 
#macro R(L P)sphere{L F}cylinder{L P F}#end#macro P(V)merge{R(z+a z)R(-z a-z)R(a
-z-z-z a+z)torus{1F clipped_by{plane{a 0}}}translate V}#end#macro Z(a F T)merge{
P(z+a)P(z-a)R(-z-z-x a)pigment{rgbf 1}hollow interior{media{emission 3-T}}}#end 
Z(-x-x.2x)camera{location z*-10rotate x*90normal{bumps.02scale.05}}

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