camera {
           look_at < X , Y , Z >
           perspective | orthographic | fisheye | ultra_wide_angle | omnimax | panoramic | cylinder 1 2 3 4
           right < 1.33 , 0 , 0 >
           up < 0 , 1 , 0>
           direction < 1 , 0 , 0 >
           sky < 0 , 1 , 0 >
           angle float
           blur_samples float
           aperture float
           focal_point < X , Y, Z >
           confidence
           variance
           look_at  < X , Y , Z >
           normal { PATTERN }
}