This tutorial shows how to model the body of a 12-volt car plug adapter. It uses Adobe Illustrator drawn bezier curves to create a Skin-type bezier object, which is then converted to a polygon mesh. This is then used to drive a subdivision surface object. It also shows several methods for generating intermediate curvature using bezier surfaces or subdivision surfaces.
For an introduction into the different data types in Design 3D, and how they can change from one format to another, go here.
