POV-Ray : Newsgroups : povray.newusers : Parallel Light/Depth Cueing : Re: Parallel Light/Depth Cueing Server Time
6 Sep 2024 10:11:23 EDT (-0400)
  Re: Parallel Light/Depth Cueing  
From: Dan Connelly
Date: 13 Sep 1998 23:02:09
Message: <35FC791F.25A14F16@flash.net>
islam wrote:
> 
> Is there a way to produce a parallel light source ?
> ....
> In short, I would like my light, close to the object,
> to still behave as a distant light
> 
> any ideas please - Thanks

Parallel lights are generated by placing point lights sufficiently
far that over distance scales involved in the scene there
is negligable spreading of the beams.

To fade the light I would use a black fog.

But if you don't want to do this, you could also try 
using fade_power and fade_distance and color in the light
statement to achieve the effect you want -- it may take
some algebra.  Note the color can be above 1 -- it probably will
need to be well above one to compensate for the attentuation
between the distance light source and the visible region of 
your scene.

Dan

-- 
http://www.flash.net/~djconnel/


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