This project offers an implementation in Unity on the problem of generating and handling planets with dynamic terrain, inspired by the videogame Astroneer.
The most relevant code can be found in Assets/Scripts/VoxelPlanet.
You can find an explanation about the main concepts and ideas behind the implementation in https://josebasierra.gitlab.io/VoxelPlanets
Unity Project:
To play the demo, download the Demo.zip and execute VoxelPlanets.exe.
Recommended hardware to play the demo (1920x1080, 60 fps):