In 3D graphics, Blender specifically, you have Displacement, which acts normal to the surface, and Vector Displacement, which can act at any angle to the surface. It's used to procedurally generate overhangs.
Assuming the air molecules adjacent to the surface are immobile [locally], displaced air molecules up through the boundary layer act at a resultant angle. Therefore, there exist shear forces as well as normal forces. And the vehicle is 'stuck' in the hole left by activities in the atmospheric shell. Shapes it's own destiny, as it were.
Am I provably wrong again?