Matt, I love this kind of stuff, but I have a hard time believing that the weathered part of the door in #3 is that blue. There'd certainly be some blue reflected from the blue sky, but wasn't the color actually more like this?
[attachment=17504:_DSC4307_lzn.jpg]
Now the green lichen on the weathered wood begins to show as green. You may not have intended the shot to be realistic. If not, I apologize.
#2 sure makes it clear that someone needs to get busy chinking that cabin before winter sets in.