interaxial distance for landscape

Turbguy1 wrote:

As I said, YMMV...

The 1/30th rule works just fine to keep the closest 15 meter distant object AT the window's edges, while keeping infinity (and everything else) behind the window.

As for controlling on-screen deviation, that requires testing with multiple viewing subjects (the audience).

That said, 1/50th will "work"...

The 1/30th rule don't work for subjects between 15 m (at stereoscopic window plane) and others at very long distances, on large screens, because will generate immense positive parallax for the distant objects.

................................................

I tested the attached Red-Cyan image on 180"/457 cm (diagonal)/~400 cm wide screen (4K projector), where the farthest area produces a positive parallax of ~21.5 cm(!), but I can see (and my wife confirmed) all the contents of the image without any problems, an impressive depth.
The interaxial distance is in the ratio of ~1/100, from the foreground wall (which is at ~68 m distance from the camera).
For the project to fit within the "rules", an interaxial distance of 25 cm would be OK, with the statement that in the case of aerial images, very distant elements are inherent, and the 3D effect will be much diminished vs in the attached image. I would go on a more aggressive solution, 30-35 cm interaxial, even if the stereoscopic window could be violated and a positive parallax greater than recommended should be accepted for objects situated at long distance.

A HMD system can easily handle very deep images, on the fact that it is not a major problem if the stereoscopic window, which is located at the limit of the peripheral vision, is violated.
Can check with the attached image on a smartphone with high resolution screen (Sony XZ2 Premium with 4k screen is recommended) and an HMD.