Alain napsal(a):
> 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.
> 

As for MegaPOV 1.2.1 @ WinXP the front square doesn't get doubly 
illuminated by the green sphere. Can you post your configuration, please?

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