Very cool, I like the time of day effect going on, but I have to ask, when you did such detail on the snow in the bottom half of the picture, especially the lower left, why on the mountains did you just do a silly string effect? lol It doesn't look bad, just wondering, cus it looks like the other areas are really well crafted.
Overall though, still good looking. I can kinda picture a lil figure standing on the ice in the lower left looking toward the facility. Keep it up!