I occasionally get this crazy graphical derp:
Optifine bugging out no doubt... Not cool, but not the issue.
Always assumed it was the texture of some machine(s) somewhere that got stretched out and warped across the world in weird ways.
Then I by chance got close today and noticed this:
Seems to be made up of every conceivable texture in the game shown in miniature side by side lol... Some are even animated... 

Always assumed it was the texture of some machine(s) somewhere that got stretched out and warped across the world in weird ways.
Then I by chance got close today and noticed this:

