Sure, Stefanos Anagnostopoulos could've bought a Joker mask based on Greg Capullo's Batman design. But why do that when he can simply make his own? Although not from his own skin, of course ...
The designer, whom you may remember from that incredible 3D-printed Ant-Man helmet, decided to turn his attention to DC Comics, which led him to Capullo and Scott Snyder's "Death of the Family" storyline and that gruesome Joker mask.
Anagnostopoulos told 3DPrint.com he spent two days designing and sculpting the mask using Zbrush (and the comics as reference), before breaking down the model into six 3D-printable pieces. It took about 30 hours to print, after which he and a friend glued the pieces together, filled in the gaps and applied primer and paint.
As with his Ant-Man helmet, Anagnostopoulos has made the design files available for download.