3D effects enable you to create three-dimensional (3D) objects from two-dimensional (2D) artwork. You can control the appearance of 3D objects with lighting, shading, rotation, and other properties. You can also map artwork onto each surface of a 3D object.
There are two ways to create a 3D object: by extruding or revolving. In addition, you can also rotate a 2D or 3D object in three dimensions. To apply or modify 3D effects for an existing 3D object, select the object and then double-click the effect in the Appearance panel.
For more information about working with 3D objects in Illustrator, see the 3D tutorials at www.adobe.com/go/learn_ai_tutorials_3D. For a video on creating 3D objects, see www.adobe.com/go/vid0053.
Extruding extends a 2D object along the object’s z axis to add depth to the object. For example, if you extrude a 2D ellipse, it becomes a cylinder.
Revolving sweeps a path or profile in a circular direction around the global y axis (revolve axis) to create a 3D object. Because the revolve axis is vertically fixed, the open or closed path that you revolve typically needs to depict half of the desired 3D object’s profile in a vertical and front-facing position; you can then rotate the 3D object’s position in the effect’s dialog box.