How do you do this?
for the concept (original under made by JackDole
) and I think JackDole use a best resolution.
It is just 2 object for represent the Earth (surface and under) and 2 others for Moon and Sun with a barycenter.
You can’t go to the surface with the object under because the top is a transparent texture.
Or maybe JackDole
use a another method.
Continue to discus this in my or him addons or help/question thread in Mods and Addons