OK Rob, Now that we know what you are trying to achieve, I would suggest that the tree line at the sky could be improved by blending back in ‘some’ of the original green trees. How much? That's really up to how you like it to look, but I think that you will find that the solid black tree tops takes away from the 'comic book' look you are going for.
I would also try the same thing with the white band. Take a look at it with the height of the band reduced as well as with the white toned down a bit. See what combination looks best to you but if you are looking for broader appeal, it is more prominent than most folks would accept, even for the comic book look. Hope this helps!