I knew I'd seen this pattern before! The XOR texture [1] is very similar. Apparently it was overused in early 2D games to test texture mappers (or for "fancy floor tiles", lol)

Actually, looking at the XOR, AND, OR textures side by side, it's easy to gain more intuition for them.

I definitely recommend reading some of the articles at [2], they're pretty entertaining and straight-forward.

[1] http://lodev.org/cgtutor/xortexture.html

[2] http://lodev.org/cgtutor/