On the right is a 15mm stone church, intended for Solomon Kane or other settings. The cross is a spare bit from one of the other wooden puzzles. Both were spray painted with a textured paint, then the roofs added and painted later.
The other two planets will be an ice world, like some of Jupiter's moons, and a Mars-like red planet. I think I need to order some more planets though, as I have lots more ideas for colour schemes.
Next up will be a ton of 6mm terrain and scenics pics.