There are some improvements on the flowers
and the grass. The twinkling starts are from
Alex Kluchikov, see this thread here:

http://news.povray.org/povray.binaries.images/thread/%3C3fc6df8c%40news.povray.org%3E/?ttop=188702&toff=400

I wrapped the twinkling star pattern around
a skydome. It has to be a spherical wrap
otherwise you get little triangles instead
of stars.

The parameter dist_exp is useful in making the
twinkling more pronounced or less pronounced.
A higher value reduces the twinkling.

Regards, Hans


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sky_sphere {

   pigment{
    crackle form <0.12,0,0> metric 1/4.1
    color_map{
     [0.1,color rgb 0.5                       ]
     [.35,color rgb <.9,.85,0.8> transmit .5]
     [1,  color rgb <1,1,0.9>     transmit 1]
    }
    warp { spherical  orientation y  dist_exp 1.25 }
    rotate <0,00.45>
    scale 0.01
   }

}
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