Hello,
Here is my latest SF visual. I tried to improve as much as possible my usual weeknesses: lights and atmospheric.
Usually i only use the default skyline of Brazil, but this time no skyligh at all but a real sunlight thanks to a brazil omni light. Makes a significant difference, with far more contrast.
For the atmosphere, the background towers have a lower opacity in photoshop, and the fog and smoke are done with nice brushes found for free at Deviantart. Here again, simple things which make all the difference.

Hope you like