How would I go about making a water sphere, as discussed before in regard to creating a whole planet, glow? And how might I make different parts of it somewhat different colors, like some more yellow and some more red areas of lava oceans? Would I need to use a glowing surface layer on a sphere rather than a water sphere? I've tried several methods and none seem to work, especially making anything glow.
Also, on a somewhat unrelated note, how would I go about adding a spherical background texture and making it visible? I've been trying to figure this out too and it just seems to not want to work.