It would be awesome to explore the "bag interior" idea Raphael had. Loose the panels and design the frame.
the fewer body panels you have, the more of the interior you get to expose ( which is what i think you wanted to highlight in your design)
I agree with Ross about the frame, but if you go the bag direction you have to make it really sweet, just because it's a bit out there. It could be really cool if you do something with fiber snaking through the frame, providing power or something like that. And the more I think about it the bag is a little strange. People go off-roading in open frame vehicles all the time no problem... not sure what the bag really accomplishes.