fog {
    distance 2000
    color rgbt<0.5, 0.55, .65, .5>
    fog_type 2
    fog_offset 10
    fog_alt 2
  }
  fog {
    distance 2000
    color rgbt<0.6, 0.65, .75, .5>
    fog_type 2
    fog_offset 15
    fog_alt 4
    turbulence 0.2
    turb_depth 0.2
  } 
  
  fog {
    distance 16
    color rgbt<0.65, 0.45, .45, .65>
    fog_type 2
    up <0,1,0>
    fog_offset -9.7
    fog_alt 2
    turbulence 1.7
    turb_depth 0.7//0.2
    omega 0.35
    lambda 1.25
    octaves 5
  } 
#end

sky_sphere {
  pigment {
    gradient y
    color_map {
      [0 color rgb <.65,.7,.8>]
      [1 color rgb <0.2, 0.2, 1>]
    }
  }
  pigment {
    wrinkles
    turbulence .5
    octaves 6
    lambda 5 //3 to 6
    omega 0.3 //0.2 to 0.6
    color_map {
      [0 color rgbt <1, 1, 1, 1>]
      [0.5 color rgbt <0.98, 0.99, 0.99, .8>]
      [1 color rgbt <1, 1, 1, 1>]
    }
    scale <.8, .1, .8>
  }
}

//cloud layer 1

plane {
  y, 900
  texture {
    pigment {
      bozo
      turbulence .4
      omega .7
      color_map {
        [0 color rgbt <.4,.4,.4,1>]
        [.5 color rgbt <.4,.4,.4,.6>]
        [1 color rgbt <.4,.4,.4,.2>]
      }
    }
    finish {
      ambient .5 
      diffuse .5
    }
    scale 3000
    translate <-500,900,-10000>
  }
  hollow
}

//cloud layer 2

plane {
  -y,-1200
  texture {
    pigment {
      bozo
      turbulence .4
      omega .7
      color_map {
        [0 color rgbt <.8,.8,.8,1>]
        [.5 color rgbt <.8,.8,.8,.6>]
        [1 color rgbt <.9,.9,.9,.2>]
      }
    }
    finish {
      ambient .5 
      diffuse .3
    }
    scale 3000
    translate <1500,900,-2000>
  }
  hollow
}