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Yes, yes ... 3d printing with frozen water. ICE is project by  McGill University (Montreal, Quebec). I am not surprised ice 3d printing is developed in tropical Canada. If this technology would be scaled up it could print building sized structures.

3d printed ice chain

Source:

http://www.arch.mcgill.ca/prof/sijpkes/ice/

PDF document with more details on ice 3d printing process, machines and technology:

http://www.arch.mcgill.ca/prof/sijpkes/ice/_source/REPARTI_ice_poster.pdf