Lady in Dream (1968) [No 3D Blu-ray]

[BleedOrange11]

The selling point was that it adopted the first "4ch Dolby Surround and the special visual effect "3D 3-D method". The "three-dimensional 3D method" is basically a kind of "multiplane" if there is no mistake in memory, and there are multiple places that are usually shot with "background + cel" between the cameras. A mechanism that creates depth and stereoscopic effect on the screen by arranging the cels and moving them at different speeds and timings. It can be said to be a cinematic technique that adds an element of physical distance (space) to a flat picture.

Sounds like they are crediting moving things in different directions at different speeds on multiple planes as making the film stereoscopic. That is manipulation of monocular depth cues to create a greater sense of depth for a flat picture, rather than the traditional definition of stereoscopic 3D, having two discrete images of each scene, one for each eye, that provide binocular depth. Hard to say definitively, but I think this is a case of false advertisement.