Nanite patterning is a form of body art whereby cheap, injectable nano causes the skin to become patterned.
Popular among the rebellious teenagers in Haven City, this is a cheap stim injector full of nano. It causes temporary patterns to appear on the skin. Not dark like a tattoo and certainly not neon or glowing. Dark or light skin tones, and possibly some iridescence.
While some of the vials are labelled, the effects are random and only last a day or two. Teens will often inject nano before a party, and then coordinate their outfit around whatever the result is. (Or hide at home if the result is awful).