Am 04.05.2010 12:06, schrieb angel3435:
> hi to all, i'm a newbie on povray an i have a little problem:
>
> i write a sky with this code:
>
> sky_sphere{
>       pigment{
>       image_map{ jpeg "sky.jpg"
>                  map_type 2    //  cylindrical
>                  interpolate 2 //  bilinear
>                  once //
>                } //  end of image_map
>        scale<1,1.02,1>  rotate<0,0.00,0>
>      }
> } // end of sky_sphere --------------------
>
> but with this code, the color blue of the sky is in all object in my
> scene...that is, in the object of the scene there is a blue component.
> How i can do, for delete this effect?

To answer that question, we'd need to know how you /achieved/ that 
effect in the first place. It's not like that's normally automatic with 
the quoted code.

Are you perhaps using radiosity? That would indeed effectively turn the 
sky sphere into a diffuse blue illumination source - which, if you think 
about it, is perfectly realistic. Note though that in reality, the 
primary direct illumination source - the sun - has a somewhat yellowish 
hue, which on average cancels out this effect.

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