This I finished a few weeks ago as a submission to Banner Year Press's Bearfight! The bear was sketched quickly by hand and then taken into photoshop where I assembled the background out of found images. I then drew over everything in Photoshop and added in the alien, which is the first time I have ever drawn anything from scratch on the computer. I think it works well together and its hard to tell that the images came from different sources.
You can order a copy of Bearfight at the Banner Year Press website: