The spheres are only made by the new rotation command. And besides, the spheres disappear after about 5 minutes anyway. It's neat what you can do with commands now. Quit freaking out everyone, they will never actually add smooth surfaces to Minecraft. Blockscape is the one with the realistic terrain!
So many people flipping out over the existence of spheres in Minecraft... Did anyone that's posted in this thread actually WATCH the video that explains it, before posting?
They didn't "add spheres" to Minecraft. Someone just figured out how to horribly abuse game mechanics to be able to create things that LOOK like spheres, using a large number of mine-carts and command blocks. The shapes aren't solid, and aren't even stable. They disintegrate after a few minutes. They are incredibly lag-inducing. In short, interesting to see, but nothing to get your underwear in a bunch over. I'm sure Mojang never even dreamed of someone doing this with mine-carts and command blocks.
This is a very interesting feature. If I recall correctly, there was a way to make minecarts invisible as well. If that is true, it might be possible to have a sphere with an opening without the obvious mass of minecarts.
Will be interested to see if this is used in other maps, perhaps by the creator of the Code. The final destruction sphere shown in this video showed obvious similarity to Code III's ending,
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