Unknown Lamer from the insects-are-surprisingly-good-at-design dept.
bpeh123 pointed out an article about generating organically tiled backgrounds inspired by the life cycle of cicadas. The trick is to overlay multiple background tiles with prime widths thus generating a series that does not repeat for a sufficiently long period. This introduces a seeming irregularity and makes the background appear much more natural.
"There is nothing new under the sun, but there are lots of old things
we don't know yet."