Cast shadow comparison, Ruth Glacier, Denali National Park. (left) Detail from Berann’s panorama of Denali. (right) A computer-generated scene using approximately the same lighting as Berann’s panorama. At (1) the size and orientation of the cast shadows are similar, but at (2) the cast shadow appears on the panorama, but not on the computer image. Berann probably shifted the light source locally at (2) toward the front and left.