Speedmapping is a Doom mapping tradition dating back to at least 2001. It was inspired by a very similar Quake exercise of the same name. Simply put, a moderator puts forth a theme for the inspiration of participants, who then attempt to make a map related to that theme. These mappers have a previously arranged amount of time to accomplish this; in most cases this limit is 100 minutes. Sessions are usually coordinated and conducted in IRC channels.