POV-Ray : Newsgroups : povray.general : Re: Clouds Don't Cast Shadow : Re: Clouds Don't Cast Shadow Server Time
3 Aug 2024 04:18:23 EDT (-0400)
  Re: Clouds Don't Cast Shadow  
From: Christopher James Huff
Date: 13 May 2004 11:18:19
Message: <cjameshuff-45968F.10182713052004@news.povray.org>
In article <web.40a2ad6cf48fa4eda2bcb8fb0@news.povray.org>,
 "CFM" <nomail@nomail> wrote:

> Ah, I already used the "finish {ambient}" statement earlier, with no
> success, but then I added the "diffuse 0" to the finish command as you guys
> suggested, and I got light clouds. Thanks for the help. BTW, why does the
> "diffuse 0" element make the change?

I can't say, not knowing the way it failed. A positive value for diffuse 
simply means that lights will add to the illumination of the surface. 
"ambient 1 diffuse 1" will still give the surface full ambient 
illumination, plus whatever contribution light sources would make. You 
might have been observing "over illumination" washing out the colors, 
but you never said how it failed.


> I'm not sure I'm familiar with double_illuminate and parallel light, so I'll
> look them up.

The double_illuminate feature causes the surface to be lit by lights on 
the opposite side. Parallel lights emit light from a direction rather 
than from a point...the sun is far enough away that its light spreads 
out very little over earthly distances, making an area light a good 
approximation. However, a highly distant area light is a better 
approximation.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: <chr### [at] tagpovrayorg>
http://tag.povray.org/


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