Surfaces in Factorio are separate maps that exist on the same server at the same time. It's similar to dimensions in Minecraft. In Factorio you could think of them as separate planets in the same universe.thereaverofdarkness wrote:What do you mean by surface?
I think some servers and some custom maps may use more than one surface, but your typical Factorio game has only one surface. Although some of the planned features of Factorio may involve space travel and whatnot, so probably we'll see more uses for surfaces in the future.