POV-Ray : Newsgroups : povray.programming : Macro for ies-data? : Re: Macro for ies-data? Server Time
28 Jul 2024 14:18:39 EDT (-0400)
  Re: Macro for ies-data?  
From: Francois Dispot
Date: 12 Aug 2000 18:44:53
Message: <3995D363.78C14227@club-internet.fr>
Lars wrote:
> 
> Hi Chris!
> 
> Chris Huff wrote:
> 
> > Uh, what is ies data? And what do you mean by "light-planes"?
> 
> ies-files represent the light distribution of a source. This is
> important if you want to simulate an architectural scene.

I might have missed something. I remember having seen diagrams showing
the intensity of emitted light according to viewing angles. It was made
by a street lighting service in my company, and both depended on the
light source itself and the reflector. They used it in simulation tools
to study the resulting effet on actual buildings or bridges.

My suggestion would be (if the light source is small enough versus the
scene to avoid caustics issues) to use an extremely small transparent
sphere around your light source and to map a suitable filtering mask
around it.

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