Bah. Now you got me thinking of the math involved in scaling it. Here is what I could come up with: (I'm just making this up as I go, I don't actually know much about 3D photography.)
Take the average distance between human irises (mine are about 2.25" apart), that's the offset distance of the cameras when picturing a normal sized human being. From there, you can work with percentages. To make your subjects 2x size, make the offset 50%. To make them half size, the offset needs to be 200%. Fish-eye lenses may be necessary for close-in pov shots.
Of course, this would be very hard to do with physical cameras, since the body of the cameras would make it hard to get small offsets. I might play around with poser though and test out this theory.
Anyway, good luck with this project. Looks like it's gonna be badass.
