My latest model is one of the most common trucks in the world today, the Isuzu NPR.
This one is configured as a delivery van, with roll-up door in the rear. Notable details include the cab with sloped windshield, fuel tank, sloped driveshaft, mud flaps, and 6 wheels.
I originally had the idea for this at one of the BayLUG meetings in conversation with another member, Brooks. He and I experimented with the geometry to see if the windshield design was doable at that meeting, and after many iterations this is what I ended up with.