It might be too late, but the only thing that struck me as being not really realistic (and I had the same issue when I wanted to enter with a moonlit scene), is that for a starry night, the overall light is too bright, and the colors too saturated. When you see so many stars, usually the landscape is pretty dark with very deep, unpenetrable shadows, and the human eye won't perceive much color, unless where bright lights illuminate something. That is a lot more work in TG though. You'd need masks around lights changing ground saturation, and object saturation.
If I speak for myself, I also often want to show every detail I put in a render, but that should not be leading.
