I really don't want to spend all my time on planets, because I see how often these kinds of projects get wrapped up in planetary generation and then never come back...still, I guess I need to have good planets since pretty much everybody does procedural planets these days.
They're getting better, although I constrained them to looking "Earth-like" for now. I think instead of picking random colors like before, I'm going to have to constrain the generator to picking from a list of palettes that I will create, since some of the planets before just looked plain ugly...purple land and green water don't really go well together.
The lighting model still needs a lot of work. In particular, the bumps are too exaggerated (and actually based off of luminance instead of height), and the water does not react to light differently than the ground, which is a terrible thing. Nonetheless, it's a step forward!