<P> Class A surfaces can be defined as any surface, that has styling intent, that is either seen, touched, or both and mathematically meets the definition for Bezier . </P> <P> In automotive design application Class A surfaces are created on all visible exterior surfaces (ex; body panels, bumper, grill, lights etc .) and all visible surfaces of see - touch & feel parts in interior (ex: Dashboard, seats, door pads etc .). This can also include beauty covers in the engine compartment, mud flaps, trunk panels and carpeting . </P> <P> In the product design realm, Class A surfacing can be applied to such things like housing for industrial appliances that are injection moulded, home appliances, highly aesthetic plastic packaging defined by highly organic surfaces, toys or furniture . Among the most famous users of Autodesk Alias software in product design is Apple computers </P> <P> Aerospace has styling and product design considerations in interiors like bezels for air vents and lights, interior roof storage racks, seats and cockpit area etc . In recent years Airbus used ICEM Surf for generating the exterior surface geometry for Aesthetics and Aerodynamic optimisation before delivering the surface to downstream CAD software like CATIA . </P>

Difference between class a and class b surfaces