Good 'ol 3-point lighting, eh? If I was designing these lights I'd make the sun the keylight and make that the strongest light there...put in just enough base and fill to give visibility. Perhaps a special on the soldier so you can see him better. I think you get more awe and mystery when the buildings are backlit and the details shrouded in shadow. And -- I'm not sure how to do that best within Carrara -- it gives you option to glare those highlights a little, give the light that special quality of sunset through the dust-filled air. So far very impressive. Already looks nicer then my stuff!