> I'm trying to make a sphere filled with a radial effect. I used media as
> show with the following code, but I still have  several problems:
> - Too much transparent (if render over a checkered wall ou image map box)
> - When rendered over a white or almost white background the effect
> dissapear.
[...]
>                      media{
>                            intervals 5
>                            samples 1,5
>                            confidence 0.9999
>                            variance 1.0/1000
>                            ratio 0.9
>                            emission rgb <0.003, 0.001, 0>
>                            density{
>                                     cylindrical
>                                     color_map
>                                     {
>                                        [ 0.0 rgbft <0, 0, 0, 0, 0> ]
>                                        [ 0.2 rgbft <0.45, 0.45, 0.45, 0,
> 0> ]
>                                        [ 1.0 rgbft <0.9, 0.9, 0.9, 0, 0> ]
>                                     }
>                                    }
>                           }

Just a guess without trying out your code:
Increase the the density values to numbers greater than 1. Say 4.5 and 9 
instead of 0.45 and 0.9.

I hope this helps.

Thomas

-- 
http://www.fmi.uni-konstanz.de/~willhalm

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