I am currently working on two different worlds for my my sci-fi game. I have Ascension to thank for his atlas tutorial which was used to create these two worlds. FYI, the actual size of these is 36" x 18", but I had to reduce them to fit them in this post.

Avalon

AvalonPlanetMap copy.jpg

Ice Planet - this planet is a terraformed world

AvalonPlanet2_map copy.jpg