Painting 4 Thumbnails in one file

It actually was pretty helpful to paint 4 thumbs in one; I was able to get ideas off of the thumbs I painted previously. I didn't make it as tight as I would like though but loose thumbnails aren't too bad if I'm playing around with composition.

I really liked how the building structure I was starting out in thumbnail #3 turned out in the end. It inspired me towards thumbnail #4. I want to combine thumb #3 and thumb #4 for a painting. I might go more towards thumb #3 though since the perspective for thumb #4 was a little odd.