Orange crust lichen

Orange crust lichen is a tile in the Factorio system categorized as decoration; it defines a ground texture used to represent patches of orange crust lichen on the map and is intended to alter terrain appearance rather than provide production, furnishing, or fluid interaction. As a decorative tile, Orange crust lichen is referenced by map generation and placement systems to change the visual surface of terrain and is not itself an item, recipe, or entity with input/output connections.