1. A method comprising: for each viewing zone among a plurality of viewing zones, selecting, from among a plurality of scenes, a respective scene viewable from the viewing zone, and generating a computer model of each of the selected scenes; and for each elemental hologram among a plurality of elemental holograms for a holographic stereogram determining viewing zone mask volumes for the elemental hologram, wherein the plurality of elemental holograms comprises a plurality of contiguous elemental portions, for each viewing zone mask volume, rendering an image of the selected scene enclosed by the viewing zone mask volume, wherein the rendering is based at least in part on the computer model of the selected scene enclosed by the viewing zone mask volume, and after rendering is complete for each of the viewing zone mask volumes, generating a composite rendered image for the elemental holograms, and storing the composite rendered image in a computer memory.