Moons are quite likely to appear in fantasy paintings, and even more so in sci-fi. Here are some things to avoid to make them look bad. Note that my exemplary moon is white because Earth's is too, but it can have any colour
"Ranarh's tiny tips" is a collection of iddy-biddy tutorials, each containing small bites of advice anyone can chew, aimed at beginner's level artists. They are not software-dependent. If there's a problem you have, something you feel someone should finally explain, or are just curious what I have to say on a particular artistic issue, feel free to tell me.
You'll find the whole Tiny Tips Collection, plus some full-grown walkthroughs in my tutorial section
. Check out my blog
for exclusive tutorials, walkthroughs, and tips.