CGtalk Steampunk challenge

I'm still running off all of the motivation gained at the NZ workshop a few weeks back, which is great, so I've decided to enter the Steampunk CGtalk challenge. More info on it can be found here: http://features.cgsociety.org/challenge/steampunk/

Here is my initial silhouette exploration. I chose a few from these to develop further into the thumbnail sketches on the grey page.