Non Smoking Zone

Wanted to try making a fully rendered image in this progam called Sai Paint tool which is REALLY nice and user friendly. I decided to draw the Smoker from Left 4 Dead 2 since it's my favorite special infected and I'm pretty happy with the end results except the background. I'm thinking of starting to do background pieces (cities and architecture) with no characters in them just to get some practice with it cause it's really starting to become a burden on me.