The peculiar thing is that this tool enables those who have manufactured the same objects before to make the objects of their dreams that traditional tools did not allow them to make. Many artisans trying 3D printers discover this potential. It is also possible to go further, and here things become odder. Thomas Demand is a German artist focusing on the underground world of caves. Stalagmites, stalactites and those multi-layer knolls characterised by layers of sediments accumulated over the millennia. For millions of years, nature has been using 3D printing techniques: he builds his objects layer upon layer. So Demand is building beautiful caves using printers, of course. At the moment, he builds only 3-by-2 m dioramas, but following Christo’s logic, he could go much fu...