Stereoscopic calculations for a perfectly cubic illusion are identical for atoms and molecules or a strand of DNA, for the solar system or the entire universe, if you could locate the edges, and for everything “in between”.
Stereoscopic Relativity and the paradoxical nature of stereoscopy can easily be demonstrated by studying an image with excessive stereoscopic deviation.
Fist of all, 1/30 net deviation is the only amount of depth that looks perfectly cubic on any size screen viewed from any distance away, i.e., no matter what horizontal field of view is used when viewing the image, no Z-axis stretch or compression is introduced. (Be sure to be at least 10 feet away from your image when doing stereoscopic research, since as you get closer than that, you start incrementally introducing a down-scaling visual artifact from excessive toe-in convergence of your eyeballs, which can make stereoscopic analysis confusing.)
An image with excessive deviation can be properly viewed by moving closer to it or farther away from it, or, to put it another way, by increasing or decreasing the horizontal field of view.
Try this: With an image with 10 to 15% net deviation, move closer to the image, thus increasing the horizontal field of view, until it looks “normal”, i.e., doesn’t have weird visual distortions or Z-axis stretch or compression. Now move farther away from the image, thus decreasing the horizontal field of view, until it again looks “normal”, i.e., doesn’t have weird visual distortions or Z-axis stretch or compression.