BRIEF DESCRIPTION OF THE DRAWINGS [0006]FIGS. 1A and 1B are a perspective view and a side view, respectively, of an ideal camera geometry for double-frustum rendering. [0007]FIGS. 2A and 2B illustrate the camera geometry of FIGS. 1A and 1B, with the addition of a near clipping plane. [0008]FIGS. 3A and 3B illustrate the camera geometry of FIGS. 2A and 2B, with the cameras translated along the z-ax