I am very much frustrated by these features.
I have yet to hear a convincing explanation for them.
There are some ideas here and here.
The only natural phenomena I can think of which can produce regular patterns is interfering waves. Change the first wave's phase to 24 and leave the rest of the parameters at default to see a natural binary pattern. However I can't see how it would apply here.
I am very much interested in any brainstorms you may offer.
Thanks in advance for any comments.