Aye, I think that if you're going to use another person's model at all, you might as well tweak it to your hearts content. You're already doing that, anyway! The only thing I can think of, aside from lights or engine flares, would be compositional. There are three elements to this image, the trees, the ships, and the sky. Perhaps adding a few more elements would make it a more interesting picture, such as small clouds of a different style, or some birds, or something like that...?