Okay here, I tried this, but I couldn't get it to work on Foundry or Sandbox so maybe someone else can. What I was trying to so was make a circular platmorm the was static in the center, but the rest of it moved in a circle. (There is one ride at the great escape where to get on, you go on a platform like what I mean. It is the one with the raft that float down the water (Not the desparado plung)) Is this even possible? I feel this could be a cool centerpiece for a map.
You cannot get immovable objects such as walls or double blocks to move at all during a game, so I don't think you would be able to do this.
I suppose you could use grav lifts and broken columns, but it would be really unusual and probably unreliable. I mean they'd probably keep getting stuck if you braced them, and to be honest it would be extremely hard to make them smoothly rotate whilst staying flat so that people could walk on them. And there aren't really any other moveable objects that could make a flat floor when you run out of columns. It's a cool and ambitious idea, but I don't think anyone would be able to make anything that you could get any sort of gameplay out of.
You could do that, but it would be very diffucult, since if the platform is a circle, the edge is going to move faster than the middle, and you would probably get major cracks inbetween. If you insist on making a round one, I wish you luck. You must make a lowered round platform that acts as brace with man cannons/grav lifts underneath, and put movable objects on top, so they travel in circles. If you plan to ajust your plan, take a look Here. This guy has done something similar to what you want; he made a convayor belt and based a map around it. The map even got featured! Edit; lol, in the time it took for me to write this, crippled hobo basicly already said everything I said.
Its impossible to get something to spin and be circular at the same time, sorry. But conveyor belts are possible.
This,If you could make one,i dought it would be smooth. And if you made it smooth,I dought it would function properly 100% of the time. Its a nice,and crafty idea. But in all honesty I dont think you can do it. But a very big congrats if you do.
I think maybe you could make a square out of crates or small blocks (depending on what map you use) and have gravlifts propel them around.