Once designers settled on the truck's proportions, they began nailing down exactly which attributes they wanted the final design to have. The Concept's notched windshield originated as a forked glass roof that seamlessly transitioned into the windscreen.
Likewise, designers wanted to fit the truck's tailgate with a storage compartment for tools and a first aid kit, but settled on the dual-purpose step/cargo cradle. Interestingly enough, the concept's active aero shutter wheels actually originated in some of the earliest sketches. Check out the photos and slides here for a closer look.