// sky -----------------------------------
sky_sphere{
pigment{ gradient y
color_map{
[0.0 color rgb<1,1,1> ]
[0.3 color rgb<0.18,0.28,0.75>*0.8]
[1.0 color rgb<0.15,0.28,0.75>*0.5]}
scale 1.05
translate<0,-0.05,0>
} // end pigment
} // end sky_sphere
// spherical cloud layer ----------------
#declare R_planet = 6000000;
#declare R_sky = R_planet + 2000;
sphere{ <0, -R_planet, 0>, R_sky hollow
texture{
pigment{ bozo turbulence 0.75
octaves 6 omega 0.7
lambda 2 phase 0.15
color_map {
[0.00 color rgb <1,1,1>*0.95]
[0.05 color rgb <1,1,1>*1.25]
[0.15 color rgb <1,1,1>*0.85]
[0.55 color rgbt<1,1,1,1>]
[1.00 color rgbt<1,1,1,1>]
} // end color_map
translate< 3, 0,-1>
scale<0.3, 0.4, 0.2>*3
} // end pigment
#if(version = 3.7)
finish{emission 1 diffuse 0}
#else finish{ ambient 1 diffuse 0}
#end
scale 3000
} // end texture
// no_shadow // optional!!
} // end of sphere --------------------- |