Jan Dvorak nous apporta ses lumieres en ce 2007/11/11 05:48:
> Hello,
>  When I use double_illuminate in a radiosity scene it does nothing (it 
> does get double_illuminated by light_sources).
> Here's a scene to illustrate:
> 
> default{finish{ambient 0}}
> camera{location <3,4,5> look_at 0}
> polygon{5,x,y,-x,-y,x pigment{rgb 1}double_illuminate translate  z}
> polygon{5,x,y,-x,-y,x pigment{rgb 1}double_illuminate translate -z}
> background{rgb z}
> global_settings{radiosity{}}
> sphere{-y/2,0.5 texture{pigment{rgb y}finish{ambient 10 diffuse 0}}}
> light_source{y/2,rgb x}
> 
> Is it a bug or it is intentional?
Working as expected.
The polygons are double_illuminate be the light_source (red), whitch contribute 
on both faces.
They are lighted in blue from the background, giving that magenta tint.
The faces near the high ambient grees sphere are illuminated in green. They are 
also affected by the other polygon, lighted in red, and, weekly, the blue 
background.

-- 
Alain
-------------------------------------------------
You know you've been raytracing too long when you have ever brought your 
computer to its knees by mistakenly launching 64 simultaneous frames to be 
traced, while trying to maximizing the benefits of parallelizing them.
Carsten Whimster

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