Cheating Dietrichs 3D model?

Hi.

I know that Dietrichs have a 3D model, that is cheating your eyes to see something that is not possible in real life. Do one of you have a link to it?

I just saw an article about the "eternal waterfall" (M.C. Eschers waterfall) - see movie here. This trick movie, is based on the same princips (it is a trick movie, but very well made!).

Hi Der_Planer.

Yes, something like that - or is it that one, that Dietrichs allways use as showcase, when they teach how to work with Dietrichs??