how to create a sphere world?

I know the normal way of creating a plane and going from their, or hightmap.

but how would I go about creating a sphere type of planet.

like the game “universim” is that possible?

I looked at universim and I guess you would just make a huge sphere model and use it just like you would a plane. And make the camera not move at all, just rotate the world sphere to see different parts of it.

This is from a novice in game dev though. lol