These optical…things…are pretty cool to play around with. It’s known as a pattern but it’s not always so, which makes it a little misleading. In terms of creating this effect, you start with a set of reciprocating similar lines and then duplicate the whole thing on top of itself. Et voila. Of course, if you copy the object and paste it in the same way, over and over, you do get a pattern.
Anyway, some examples below show you what can happen and wikipedia has two animations (putting in the effort!) to show the effect at work. It’s one of those funny graphic devices that, by really simple means, makes an extremely complex mathematical process take place. So it’s similar to the kaleidotype. I think I’ve yet to see a good piece of graphic design that makes use of moiré; within reason, it could be used as a letterhead feature, or a device in brochures maybe. One example below, I thought, might suit a sushi restaurant identity. My own efforts are only early tests but maybe I should apply a moiré effect to my kaleidotype! That might give my computer’s memory a little challenge: shall let you know if it crashes.