I can only comment on the last sentence. For a perfect hemisphere
heigth_field, you can use this code:

sphere 
{ 0, 0.9999 // avoid coincidence btwn. sphere and gradient
  texture
  { pigment { gradient -z color_map { [0 rgb 0][1 rgb 1] } }
    finish { ambient 1 }
  }
}

camera { location -2*z right x look_at -z orthographic }

You might need to move the camera back or forward for a better fit but
the idea is clear.


Peter Popov
ICQ: 15002700

Post a reply to this message