cylinder camera
// cylinder lens for axis distorted field of view
// 1 is vertical cylinder, fixed viewpoint
// 2 is horizontal cylinder, fixed viewpoint
// 3 is vertical cylinder, viewpoint moves along the cylinder's axis
// 4 is horizontal cylinder, viewpoint moves along the cylinder's axis
camera {
cylinder 1 // types 1, 2 ,3, 4
location <0,0,-1> // position
right x*5 // horizontal aspect or field of view
up y*2 // vertical aspect or field of view
look_at <0,0,0> // view
}