Sanguine lichen

Sanguine lichen is a tile in the Factorio decoration category that serves solely to alter terrain appearance by covering ground with a crimson lichen texture; it is a cosmetic surface used for map decoration and aesthetic variety and does not provide resources, production functions, or gameplay mechanics. As a decoration tile, Sanguine lichen is placed like other terrain tiles to change the visual look of an area and is used to create themed environments or visual contrast without affecting entity behavior, movement speed, or resource generation.