This David.
Oh -that- David. I remember him. <cough>MSD</cough> =]
You can't really shift a 3D scene [texels] to the side the same way you could a 2D [pixels] one without having to render it all again anyway...
Aren't the 'images' all rendered in quads? Couldn't you just shift the quads? Isn't there really no 'drawing' done at all except for the renderer? I understand nothing =]