Here is another Flam and Hopper picture, I'm working on a few more right now, should have those up later in the week. For the textures on the tree's I was trying to get an Art Lozzi effect.
See this link for example. John K's blog, very informative and intresting.I admire his work a lot.
This is some early rough Hopper designs. That guy in the bottom left corner, his name is Forest, that's a completely different post though.
These are some color tests I did with the two. I have more... but they're ugly.