Inside a Globe
If you're seeing facets, you may have created a faceted rather than a smoothed
sphere. The important step, however, is to flip the face normals on the sphere
so they're on the inside (Surface/Normals/Object Flip). Another trick is to use
a reflection map with clouds instead of a texture map. Reflection maps don't
need lights or mapping coordinates, and as you move the camera, they'll stay in
place, giving the illusion of distance. If you decide to use a texture map,
however, you might try adding self-illumination to the material.
– Jack