To view in stereo, go cross-eyed so that the two images register exactly over each other. You will see three images – concentrate on the middle one until you get a three-dimensional image. Try to relax, and the image will find its full depth.
The Coyote group at the American Museum of Natural History in New York has a background painting by James Perry Wilson, and is absolutely breathtaking – especially the difference in the transparencies and surface of the still pond int he foreground and the river behind – See: https://natchard.com/2012/02/09/dioramas-2/ The Coyote diorama at the Natural History Museum in Los Angeles is pretty carefully made. Like many of the L.A. dioramas the background appears much more scenographic than the ones in New York. I could only find a single photograph – I will have a search and see if I also took a stereo pair and will post it later if it exists.
I have posted a photograph of the White Rhinoceros group at the American Museum of Natural History before (in stereo, if I remember correctly). The 1937 diorama has a fine background painting by James Perry Wilson. It is located in a corner of the mezzanine level of the Akeley Hall of African of Mammals in a corner with a low ceiling (which wilson tries to disguise with heavy rain clouds). To fit the two large White Rhinos in the tight space without them standing too close to the observer, one is located very close to the painted background. To help mitigate against a shadow on the background (which would collapse the illusion of depth) apparently the hidden side of the Rhino is painted white. This possibility of negating one’s shadow has been teasing me recently and will be part of the new instrument I am working on.
A small diorama nestled between the main views of North American Mammals at the American Museum of Natural History in New York. Background painting by James Perry Wilson.