It's because the sky is simulated. The light that illuminates sky comes from
the sun. So the blue intensity in the sky should never be higher than the
blue intensity of the sun e.g. sun: rgb ( 1.0, 0.9, 0.5 )  might have a sky
of rgb ( 0.1, 0.3, 0.5 ) and not rgb ( 0.1, 0.3, 1.0 ).  (I don't know what
the settings are in the pic)

I think absorbing media and scattering media might make a more 'real' sky.
BTW, has anyone tried making sky with media before?

Nekar

"Jan Walzer" <jan### [at] lzernet> wrote in message
news:3ab7aef0@news.povray.org...
> Hehe ... I asked this myself ...
> The Heaven is blue ...
> so the most ambient is blue ...
> The sun is yellow ...
> so where the sun hits the sphere, there is the ambient and the sun
> (blue + yellow) that gives white ...
>
> The shadow of the sphere, that is not lit by the sun is blue, because
> of the ambient ...
> below the sphere there is no ambient, but the sun brightens some parts
> ...
> so it gets yellow ...
>
> You understand ?
>
> --
> background{rgb 1}camera{location<1,5,-2>look_at 0}#macro
> m(a,b,i)#local d=(b-a)
> /8;#local
> e=vcross(d,y);#if(i)m(a-e,a+e+2*d,i-1)m(a+e,a+2*d-e,i-1)m(a+3*d-e,a+e
> +3*d,i-1)m(a+3*d-e,a+5*d-e,i-1)m(a+6*d-e,a+e+6*d,i-1)m(a+8*d-e,a+e+8*d
> ,i-1)#else
> cylinder{a,b,vlength(d)/3 pigment{rgb 0}}#end#end m(-4*x,2*x,4) // Jan
> Walzer
>
>
>

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