//  Persistence of Vision Ray Tracer Scene Description File
//
//  Water Tunnel Scene: Sky
//
//  Copyright April-June 2001 Christoph Hormann
//

#declare P_Clouds1=
pigment {
   gradient z
   pigment_map {
     [ 0.3
       bozo
       color_map {
         [0.2 color rgbt < 0.91, 0.96, 0.99, 0.0>]
         [0.4 color rgbt < 0.91, 0.96, 0.99, 1.0>]
       }
       turbulence 0.85
       lambda 2.8
       omega 0.6
       octaves 8
       scale <0.5,0.5,0.2>
     ]
     [0.5 color rgbt 1]

   }
   rotate 80*z
}

#declare Sky_Bckg_13 =
texture {
   pigment {
     gradient z
     color_map {
       [0.0 color rgb < 0.780, 0.835, 0.976 >]
       [0.27 color rgb < 0.300, 0.450, 0.950 >]
     }
     turbulence 0.05
   }
   finish { diffuse 0 ambient 1 }
}
texture {
   pigment { P_Clouds1 }
   finish { diffuse 0 ambient 1 }
}

sphere {
  <0, 0, 0>, 1
  texture {
     Sky_Bckg_13
     rotate -20*z
  }
  scale<1000, 1000, 200>
  no_shadow
  hollow on
}