Research on shooting methods of 3-D program production for natural and fatigue-free 3-D images has been continued. Toed-in and parallel camera configurations are available for shooting 3-D programs. The former is usually used because shooting and viewing conditions can be simply set to get a desired 3-D design. It has been shown, however, that this camera configuration brings about the inconsistency between depth information by lens perspective and that by binocular parallax, and that the inconsistency leads to the size distortion called "Puppet Theater Effect".
