Hi all, Here's two items that I received today. I am very happy with the result. The quality of the printed items is good. The illusion also works well, at least when viewed with only one eye. When you view it with two eyes, the additional depth perception spoils the illusion, as was expected. I am aware that I am not the first to have impossible triangles printed in 3D, but done like this, using cubes, I have not seen before. I think the cubes help to reinforce the illusion. The photo gives some clues how the illusion has been realized, but in case you are curious about the 3D model, check out the following animation: http://eriban.deviantart.com/art/Impossible-Triangle-Animati on-376637539 These were prototypes. The next step is to have one printed in stainless steel. Cheers, Erwin P.S. Sorry for the poor image quality, but it's the best my ancient mobile phone can do.