This page is about the darkness of a screen that hides terrain. Darkness may also refer to a kind of terrain, as in the land of Living Darkness

Dark screens can be made bright by lighting a fire (using the Arson skill,) on them. They stay lit until the fire goes out. Players who have lanterns may see even if there are no fires lit. Players wearing sunglasses cannot see fire or the light from a lantern.

Most items and enemies are still visible in darkness, but it's harder to find the path to walk on, and so more dangerous if they attack.