The graffiti that litters the backgrounds is probably my
favorite detail in rain world. No matter how bitterly cold,
crushingly lonely, or suffocatingly claustrophobic an area is, there
is often evidence that someone was there before you in its current
state.
additionally, sometimes graffiti serves as notes from those before
you volunteering information to any future passerbys. incredibly
useful for high interest but obscurely located destinations!