A couple of strange, hidden details of the Sumerians are out there still.
The sumerians wrote of technology in rocks. Modern interpretations go as “The science in the minerals” or something like that.
Islam, to, believes that rocks contain ... things. Dare I say “Technology” because that’s obviously not a word in either vocabulary.
But the whole of Islam prays to this rock in Mecca. They believe that Allah is in there, and that that rock is almost like a device. Again, I’m using English words for a cult that barely understands how water works.
When they said “3D printing” I really, really had to know what material they are using, and if there is significance in the shape and locations of these archways. Because seriously, in the terms of Sumer and Islam the material is key.
3D printing is generally plastic, different types for different processes of 3D printing, and depending what you are making. There are many types of plastics suited for different purposes. It is called printing, for lack of a better term I suppose, but it is actually plastic extruded in many thin layers to build an object. The machine works from 3d files.