POV-Ray : Newsgroups : povray.advanced-users : Spotlight problems : Re: Spotlight problems Server Time
3 Jul 2024 05:29:41 EDT (-0400)
  Re: Spotlight problems  
From: CShake
Date: 16 Feb 2009 18:11:37
Message: <4999f2a9$1@news.povray.org>
Alain wrote:
> Blackbody(3200) is rather redish, not slightly off-white, similar to a 
> spotlight running with a much lower voltage than it's rating.
> A value around 4500 to 5000 would give you a much yellower tint. And 
> around 6500 will be close to white. 7000 will give a marked blue cast.
> 
> If you see the cender of the beam in a weak reflector, it will look 
> prety orange.
> 
> fade_color is NOT used for lights, but for coloured transparent 
> materials and is found in the interior block of such objects.
> 

Thanks for the clarification on fade_color, I saw it in the help file in 
the same section as spotlight so I was unsure.

The reason I'm using a low temperature blackbody is that the lamp I'm 
trying to simulate (the HPL740 used in ETC brand source four lights) is 
at that temperature, and most other stage light instruments (except arc 
lamps) are around 3200K. The color gels I'm simulating were made for use 
with this temperature light, so for most light sources there is also a 
thin object with a color filter value in front of it.


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