After posting about the Morphy Stereoview (July 2016), I started to wonder how many stereoscopic images related to chess. Of course I can't answer that question definitively, but I can determine if the number is a little or a lot.
I gathered all of the 'stereo' images I've collected from eBay (which is a marvelous source for unexplored areas related to any subject, chess included) and counted close to 100. Some of them are duplicates, but the dozen shown below are all unique.
The image second from the left in the bottom row is the same shown in 'Morphy Stereoview'. The rightmost image in the top row was used in Morphy, Loewenthal, Young Man, and Lady (November 2011). Wikipedia's page on Stereoscopy explains,
Stereoscopy (also called stereoscopics) is a technique for creating or enhancing the illusion of depth in an image by means of stereopsis for binocular vision. Any stereoscopic image is called a stereogram. Originally, stereogram referred to a pair of stereo images which could be viewed using a stereoscope.
Most stereoscopic methods present two offset images separately to the left and right eye of the viewer. These two-dimensional images are then combined in the brain to give the perception of 3D depth. This technique is distinguished from 3D displays that display an image in three full dimensions, allowing the observer to increase information about the 3-dimensional objects being displayed by head and eye movements.
Now that I've gathered these images, I'll try to use them as the basis for another post.