WOW! That’s an amazing peice of artwork. The details are amazing. I have a couple of suggestions that I think would take this peice over the top. First, I feel like I am falling off the peice of artwork. I think that is because of the strong perspective that you have chosen which I think is great. I think what would help is to make the mountian in the far lefthand corner larger and bring it up about half way up the ship. The second suggestion is to overlay this sky with a subtle romantic sunset. I think it would help with the color issue and and help explian the long shadows that you have going. I did a quick overlay of your peice with these suggestion and will send it to you if you would like.