We actually had Peter Pound, one of the principle artists, in to do a guest lecture for one of the courses here at UNSW Built Environment recently. It was great to not only see the original drawings but to get a better glimpse behind the scenes. As he works principally using traditional media, each revision of the design for say the War Rig was a new drawing - and a beautiful drawing at that.
Peter Pound Concept Piece
Some links to cool things:
Mad Max Fury Road Official Site
Art of VFX Article
WIRED VFX Article
WETA Workshop Article
After watching again I am a little more inspired to try the Apocalypse World game in its original setting - the book is superb. Would give us as players a chance to delve deeply into our own version of this style of world, to see how humanity and individuals might deal with such the hardships of such a time...