Ring Worlds

It's self explanatory, really. But: here's how it would work in a fully functional form.

Creation in Creative:

The average server admin (not the average troll who joins the server to spawn a Dyson sphere of planets around the Earth) heads off to a new tab in the shift + f10 menu, simply titled: "Ring World". From there, the poor schmuck can select things like: what kind of planet is it based off of? What this means is: is the terrain similar as to that of [insert large list of planets here]. This will change the terrain to be moon-like, or earth-like, or alien-like. Then there's the size option I don't know, there could be a-lot more. It can have the maximum radius of planets I guess. Once the admin is finally content with his soon to be abomination, he spawns it in like a planet, or maybe he'll spawn a 120km ring around a 19km earth that also has a 19km moon.

Creation in Survival:

Some poor schmuck flies far, far away from a planet and then creates an elaborate space station with some mega dank block that can create ring-worlds. The player then spends a life-time depositing all of his goods into a single block for approximately a in-game day, and in Space Engineer terms, an in-game day on a planet is about four real-life days, so everything checks-out. After they waste their time, they get to spawn in the ring world after changing the options and stuff of the ring. Boom, they have a ring, but they used their grinder on their ship to make it and the player doesn't have any hydrogen, so now he has to make a leap of faith to the ring (a long time later, floating at 10m/s towards the ring) he gets pulled in and breaks his legs. Oh, look at that, a new spawn-point on the ring because some schmuck on the server saw the ring and made it his own.