I'm not sure if that's exactly the same, but certainly looks like a "lithophane" for which you'll be able to find much more information. Also the way this was p

I'm not sure if that's exactly the same, but certainly looks like a "lithophane" for which you'll be able to find much more information. Also the way this was printed also certainly looks like it was made by one of the tools already available to produce these (these became a thing since some years now in 3d-printing). Essentially, the brightness of the picture is mapped to thickness. Bright spots in the image correspond to thin areas in the plate. The effect is that when back light hits the plate, more light will be able to pass through thin areas, restoring the original image. The plate is also "3d" in nature because of this, so it looks like a bumpmap texture without light and I can share with the author that's it's extremely cool to see/touch also without lighting. The plate is commonly printed vertically (as it results in higher cross-section resolution in the FDM printing process), and using an arch layout is common as well as it makes it self-standing.