So I was thinking about how to do the planets, and suddenly I realized, I have fictional planets! I have to make them from scratch.
I was vaguely thinking to use photos -- I know, I said I didn't want photos! lemme finish! -- start with photos and create stylized versions via photoshop filters or autotracing or who knows what (my technical term for this process is "dinking") ... but then, I can't use the typical photos out there because they're all, as they said in Snatch, "at a funny angle." Equatorial views would look just STUPID in a birdseye map. But all polar views would look just stupid anywhere.
Finally I decided I need all the planets back at that jaunty angle, somewhere around 45° ... and my chances of finding 'start-with' photos of the planets at 45°, without shadows(!) (because the shadows all have to point away from the sun) is very VERY low, and my chances of finding pix of the fictitious planets, at any angle, is very VERY close to zero.
INSPIRATION STRUCK LIKE A BALL PEEN HAMMER: Get Mercatorish surface maps for the real planets, make such maps for the fictional planets, map them onto spheres, and then I'll have a whole consistent set of planet images that I can stylize away from photographicality via dinking.
So I have begun to gather up surface maps of the planets (screenshot 1) and map them onto spheres (screenshot 2).
I'll make fictional planet maps easily enough with some noise & filters. I need to make some representations for asteroids and space stations, too. They'll be small, so they can be simple, so they ought to be not too difficult.
Then I get to dink