[gtroja]

I liked your technique in [0]. I have achived something similar by having a diaphragm with two holes in the lens [1]

[0] https://flickr.com/photos/---mike---/51018990043/in/album-72... [1] https://www.flickr.com/photos/troja_/33154974111/

[mikewarot]

You can think of all of these as possible ways you could put a number of holes in front of a VERY large lens.

In [0], the distance was changed, but just shifting left/right a tiny bit gets you parallax, as seen in your photo[1]