In automotive design, a class A surface is a freeform surface of high efficiency and quality, in terms of aesthetical reflectivity. Strictly, class A surfaces have curvature and tangency alignment. However, many people interpret class A surfaces to have G2 (or even G3) geometric continuity.
Class A surfacing is done using computer-aided industrial design applications. Class A surface modellers are also called "digital sculptors" in the industry. Industrial designers develop their design styling through the A-Surface, the physical surface the end user can feel, touch, see etc.
