Thanks rappo! Yeah, I used photo-realistic colors for the sky, including smog. We get smog up here in the Bay Area too, so ive had my references. The very smoggy days are actually based on a smokey sky from local wildfires in my area back in October. The sky was actually that orange during sunset, and i tried to make the sunset in-game appear as close as I could to that one in real life.
Specs: AMD Phenom II 940 3ghz, ATI Radeon HD 5870, 4gb DDR2 800, Windows 7 Professional x64