Impossible Penrose Triangle as a 3D printed object -- UPDATED

A cunning 3D designer named Artur Tchoukanov has worked out a way to 3D print the "impossible" Penrose Triangle, a famous optical illusion seen in the work of MC Escher.
"The first clue was that the top face was in shadow (darker)... that let me to believe that it was a concave surface. Then I figured that they all need to be connected." Artur then designed his solution using Rhino. So we're curious to see if Artur did solve it? Or is there another solution?
Impossible 3D printed Penrose Triangle: solved?

Update: Ulrich sez, "It has now come to our attention that Artur was not the first to figure it out. The original design and printed object were created by Ulrich Schwanitz who confirmed to us that Artur's solution is correct. Make sure to check the video, it will blow your mind even if you know how it works."


  1. Yes, Artur (sort of) figured it out from our original design, the actual print that we made and the published pictures.

    I am a little disappointed to see him noted as the inventor.

  2. Not really convincing. My first impression was one of open 3sided boxes, not one of closed cubes, because the perspective of the outer edges of those “cubes” isn’t right. The object could be corrected for that, but only for one point of view.

  3. Step 1: Make interesting optical illusion
    Step 2: Challenge people to figure it out
    Step 3: Threaten anyone who solves it
    Step 4: …
    Step 5: Profit?

  4. @trompevenlo, the copyright troll: If you want to claim rights as the “inventor”, you should have registered a design patent. Tough shit that you didn’t. You can’t claim copyright over an idea or a solution to a problem. If you claim to have found a “solution” – and I’m not buying into this marketing idiocy because I know what “mathematically impossible” means – then such a solution would be purely functional and not protectable. Again, to steal solutions from problems out of the public domain and lock them up as IP, you need a patent.

  5. The first person known to design this “solution” for the Penrose triangle was Swedish artist Oscar Reutersvärd, as early as in the 1930´s. There are a few other “solutions” as well.

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