RPG world idea:
@LexYeen Oooh, sounds fun, and full of possibilities.
I'm reminded of the Ringworld series, where even though it was a rig and not a sphere, there was more than enough space in the oceans /alone/ to model entire planets at 1:1 flattened scale.
One ocean literally had an uncountable number of flattened Earths, each its own biome and social structure.
On a sphere? Your continents could be planet-sized, or bigger. :-)