The American Calty design team took a different approach to designing the car, using plaster molding shapes to design the body, and working three-dimensionally instead of the traditional 2-D sketch approach. As described by design chiefs Denis Campbell and Erwin Lui, the result was a car that was based on "emotion and feeling" rather than linear aesthetics. The resulting design possessed almost no straight edges, and produced a drag coefficient of . The production design concept by Lui was approved at the beginning of 1989, resulting in Lui being sent back to Japan for 4 months to assist in completion of the production design. According to automotive journalist Bill Russ, the SC design was considered influential among automotive designs of the time.