Your Stage is a system in the upcoming DiRT 4 game that ables players to generate racetracks.
“DiRT 4 also features a game-changing system called Your Stage; an innovative rally route creation tool that allows you to produce an almost-infinite number of unique stages at the press of a button. You choose your location and set the route parameters, then Your Stage does the hard work to create a unique rally stage that you can race, share with your friends and then challenge them to beat your time. Your Stage allows experienced rally players to create longer, more technical routes, whilst newcomers can create simpler shorter routes as they hone their skills.”
— Steam description