These are two environments I did after watching Scott Robertson's Unique Environment dvd. It's a pretty cool technique that's really just a lot of fun. I used his marker sketches he included on the dvd. I don't really do environments all that well and I highly recommend getting this dvd for anyone wanting to increase their environment and storytelling skills.
The first images are the composites you pull out of the marker sketches and the second images are the rough paintings. I messed up on the first one and added a dodge effect to the marker sketch, but you can get what's going on.