A Digital Safety Net

While the majority of my work is produced using traditional processes, I often rely on digital methods to fine tune an image. Take for instance the recent cover art for The Pied Piper of Hamelin.
Looking at the scanned art, I decided I'd like the rats to be more in shadow, so I used Photoshop to deepen the shadows in and around the rats and to add to the moonlit highlight. I also lengthened the sky at the top edge to better accommodate the title panel.
For anyone who likes to play 'Spot the Difference', here's the original scan and how the image sits on the cover.