Abstract: An equidistant stereo lens shader includes a user controlled device and an output device. The user controlled device includes one or more controllers, which are configured for orientation of a stereo field, orientation of a projection surface relative to a camera, use of converging stereo rays or parallel stereo rays, control over the zero-parallax distance for converging rays, and control over the interocular distance. The output device is configured to output left-eye images, right-eye images, or monoscopic images as equidistant fisheye projections.