Circles!!!!

So, i was playing around with CMD blocks a few mins ago, and using the {Motion} tag on falling blocks entities. After running it a while on a repeating command blocks, it created a perfect curve! This means you can generate perfect curves and hemipsheres in vanilla in just seconds!!!!!

 

pics or didnt happen

 

i'll get screenshots ASAP

 

picsssss


Also this has been done before with armorstands and entities

however in just seconds sounds interesting, instead of downloading a map

 

ive done it once, its not that hard
summon a falling sand with a motion tag. Ex how motion tag works. {Motion:[0.0,0.0,0.0]} fill in 0s with numbers

 

*waits for minecraft to explode*

 

hehe. It's *technically* not perfect because it's made of blocks. but it's the closest you'll get with commands.