The tracks feature different surfaces such as shale, tarmac and concrete.

Unlike de Stael's paintings, which tend to feature extremely thick painterly surfaces, these compositions are thin, light and dry.

These mechanics are then used to navigate through levels featuring wind currents, enemies, water, fire, gases, spikes, sticky surfaces, and further complexities.

Interiors feature curved surfaces and is in a good state of preservation.

These walls featured 3 or more horizontal and sloping surfaces.

Finally, the game introduced a brand new graphics system, that featured increased lighting, dynamic physics, and smoother surfaces.

The empennage (tail assembly) featured relatively small and well-balanced horizontal and vertical surfaces.

These works feature monochromatic and highly polished surfaces in a range of sizes and proportions.

The eventual design characteristically featured faceted surfaces to deflect radar waves elsewhere.

Northrop's and Lockheed's designs were generally similar, though the former's submission featured more angular and flat surfaces.