The Biospheres Mod provides a new generation of the world in Minecraft in the form of glass balls that are in the void.
This is a biosphere, each ball has its own biome, and for survival and development, you need to travel through the spheres. In addition to spheres with biomes in the void, there are also small spheres from different blocks that can be mined.
The mod has a config file that will allow you to adjust the size of the spheres, the distance between them, etc.
How to install the mod:
Download the Biospheres Mod