I like to show my newly created illusions for my friends and family, to hear what they think. Naturally I sometimes hear that the figure surely is possible to create in reality, that it is not impossible at all. It is a bit tiring to explain what my thoughts behind it were, and how it is impossible, but I try to help my online audience (you?) with my descriptive texts, even if I find it a bit tricky to make sense of insensible things.
The four frames intersect each other in a peculiar way. If you follow one, you’ll notice that you can continue to step forward onto another indefinitely, and still end up where you started. This while all the frames are perpendicular with straight angles.