1. A composition method for generating stereoscopic images, comprising: positioning at least first and second pairs of virtual cameras for imaging an animated scene; with the first and second pairs of the cameras, obtaining three-dimensional (3D) data for each of the cameras for the animated scene; defining a blending region by defining a first boundary surface for the first pair of the cameras and a second boundary surface, spaced a distance apart from the first boundary surface, for the second pair of the cameras, wherein the blending region comprises a space in the animated scene between the first and second boundary surfaces; and with a blending module run by a processor, processing the 3D data in the blending region to combine the 3D data from the first and second camera pairs.