camera{ spherical
        // for a 360 degrees panorama use aspect ratio 2:1 !!!
        angle 360 // horizontal angle
              180 //   vertical angle
        location < -2.50,  2.50, -1.2>
        right    x*image_width/image_height
        look_at  <-2.50,  2.50,  4.00>
      } //---------------------------------