1 This inverse curve is purely the product of tensions within the membrane, controlled by the form-defining hard ribs beneath the skin.
2 It's easy to see how the fabric is constrained by a "bone" and flows past it with elegance.
3 The divided windshield gives the Gina a touch of classicism, and because the center pillar thickness is less than a driver's interpupillary distance, there is no reduction of visibility.
4 It is easy to sense the strains on the fabric that create this concave surface between convex ribs around the wheels and the long, elegant "fender" line extending from door to grille corner.
5 This curve is awkward and unnatural, no matter if it's shown here, on the X5, or on the Z4. it should have been created with a wooden ship's spline, not drawn with a clumsy kink.
6 Much of the lower backside is messy, but it is nicely shadowed and unobtrusive. The machinedaluminum exhaust outlets are particularly nice.
7 The parlor trick that makes everything clear is the ability to raise and lower the arched rib defining the deck lid's flow-tripping spoiler. as it falls, the area with the badge becomes concave, as on the Z9 concept.
A The fluidity of the interior derives from the tension in the unconstrained fabric areas between points of anchorage.
B The harmony of interior and exterior curves is notably better than on 99 percent of car designs.
C These are the coolest of cool details. The Gina's skin wrinkles when things bend, fold, or blink. So does yours. And mine, and Angelina Jolie's. Isn't that nice?