A little more work on my custom stereogram (magic eye) python node for ComfyUI. There seems to be an optimal ratio for the image size to the pattern size, but I'm not sure exactly what that is yet. Feels like I'm getting closer though.
Here's Crater Lake, and the depth map it came from. If your eyes are able to get the 3d effect to converge, you should see an exaggerated z-scale of the topography/bathymetry.