POV-Ray : Newsgroups : povray.general : Light Attenuation : Re: Light Attenuation Server Time
21 Apr 2024 05:30:53 EDT (-0400)
  Re: Light Attenuation  
From: Trevor G Quayle
Date: 13 Mar 2011 11:10:01
Message: <web.4d7cddd5315d1becb05ef170@news.povray.org>
clipka <ano### [at] anonymousorg> wrote:
> As I previously tried to show, it /is/ sufficiently close to the inverse
> square formula when you specify a small fade_distance, and it is
> actually /more/ realistic than the inverse square formula.

Yes, I have found this now.  What my problem was before was that I was using
very large fade_distance values.  If I use very small ones, it works out much
better.  This does mean usually that my light source intensities get huge: for
example, in my projector, the distance from my light to the screen is 2492, I
have a fade_distance of 4.58, my light intensity needs to be 148210 to have an
intenisty of 1 at the screen.  But it does look much better with the fall-off
rate I was more expecting.

-tgq


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