Colour and atmospheric perspective issues

[Wardy]

I'm going to try helping you, though not an expert ;)
As I presume, the top of the crystal tower is supposed to be the focal point. So I would consider darkening the planet again, otherwise your crystal city's disappearing due to no contrast. Also, the waterfall is a nice idea to point out there's a canyon, but right now it looks like the city is sitting in the water. If that's the plan, ok, but again, the waterfall is the same value as the city as the planet so there's no contrast and it's basicly this huge white plane drawing all attention. I would make it smaller and darker. Show as the actual canyon the city is standing on. As a side effect, the canyons in front would come out more, since right now their edges are the same value as the waterfall, the city and the planet ;)
And finally: Lose those floating crystal thingies, they're just distracting the eye from the focal point without telling us anything. If you want to keep them, make them less dark, because that's what's making them stand out right now.
That's it. I hope this wasn't all nonsense and that I was able to help you somewhat. =)

Yes i see what you mean with the waterfall, city, planet and rocks kinda merging, thats what I'm trying to stop but I find that if the planet is dark it doesnt make any sense for the other factors to be light. What I'm considering is just having the very outer line of the planet showing, the rest being sky, as you would at day, because otherwise its like having a very dark background but really light stuff in front of it.

Great idea with the waterfall, will make that narrower and draw some rock fo the city to be resting on, because your completely right with the city looking like its resting on water.

The crystal things arent essential so you are right there, they just pull focus and look silly :) Will play around with the darkness of the planet, i may just paint it all and then add the planet in the background and make it fit in that way, because otherwise im losing grip of what I should be doing with atmospheric perspective trying to get it to fit in with the planet.

None of that was nonsense, thanks very much youve been extremely helpful. Will work on it some more and then update. Thanks very much! :)