Updated original post with two more pictures: Khan, and Thraxus – Background.
You’re probably ready to start highlighting and shading, too. Item: Background /Shapes, second to last circle gradient with colors 1 & 3 to 0%alpha, then go dark or light with color 2 and start applying it. Cantdraw did a tutorial on ‘shine’ somewhere in the ‘how tos’ or the ‘Tips & Trix’ sections.
I read up on the first part of his tutorial earlier, but I didn’t see parts 2 and 3 yet. Am I just missing them?