I was setting up some planes and experimenting with PlaneGeometry parameters. Increasing the number of segments creates this sort of complex meshes which look pretty nice and a bit grand if you ask me (in a highly abstract way of being grand, of course).
Then I noticed that apart from the moire artifacts, there was something else:
From time to time a little hole will show up in the mesh. It's just another "glitch" in the rendering, and it corrects itself once the camera is modified, but it's funny nevertheless.