There was a scene in the movie, with a mumified corpse in a vehicle, that reminded me of something I'd seen before in a book called "Spacewreck".
Spacewreck is part of a series of children's books Terran Trade Federation. Seems to ilicit a strong response in people including modelling them in PovRay and Homeworld mods.
A directory filled with the original artwork from the first book is here. Two paintings by Angus McKie look a bit like the design of Serenity without the engines (here and here). This is mentioned in a Firefly site thread.
More gallery links: Fred Gambino, Peter Elson, Chris Foss and Angus McKie.