POV-Ray : Newsgroups : povray.newusers : Spotlight confusion : Re: Spotlight confusion Server Time
4 Sep 2024 20:17:39 EDT (-0400)
  Re: Spotlight confusion  
From: Christopher James Huff
Date: 10 Aug 2002 12:03:35
Message: <chrishuff-5BE097.10535010082002@netplex.aussie.org>
In article <3D5### [at] maccom>,
 Dawn McKnight <blu### [at] maccom> wrote:

> > Probably due to the angle of the surface to the light direction. You 
> > could lower the brilliance value of the surface finish, but that will 
> > affect all shading of that surface.
> 
> You're saying that the angle is too acute?  At what zenith range do 
> spotlights work best?

Wrong question. Any light will light a surface most brightly when its 
direction is perpendicular to the surface, parallel to the surface 
normal. Your description makes it sound like the light is very nearly 
parallel to the surface, so shading will make it dimmer. It isn't that 
the spotlight isn't working right, it is doing exactly what it should.
Another possibility is that the point_at location is inside the shape, 
or otherwise positioned to make the light get blocked by the shape. You 
only gave an example of the spotlight, so I can't really say. Try a 
point light and see how the surface gets illuminated. If that fixes the 
problem, there is something wrong with the point_at, radius, or falloff.

-- 
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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