Volcanic ash dark

Volcanic ash dark is a decoration tile used in Factorio to provide a dark, volcanic ash ground texture for map surfaces; it is a tile-type decorative entity and has no intrinsic gameplay effects such as movement speed modifiers, resource spawns, or collision. Its purpose is visual only, used by terrain generation and map painting to give areas a volcanic appearance and to blend with other terrain tiles. As a tile entity, Volcanic ash dark integrates with the game's tile placement and autoplace systems but does not function as an item, building, or fluid.