A vagabond's sketchbook

[MrFrenik]

Don't get down on yourself, man - this one's actually looking quite good with regards to depth. Just remember that the further you go "back" in perspective, the more the atmosphere builds up and causes the value range to compress in objects and the saturation to lower. An easy way to find what values to use is to use a low opacity with a dark value and lightly paint in the background. Then just color pick that value and paint in full opacity to build out your shapes. It looks like you've already been doing this, so it just takes getting used to thinking about how to render forms in the background. Remember that your lighting will still be consistent across the image and to compress your values as you go back and you'll be fine.