Once you’re happy with the size and position of your symbol on the selected surface, use the arrows at the top of the dialog to navigate to another side to map additional symbols, as needed. At any time, you can click the Clear button to remove a symbol from a selected surface, or you can click the Clear All button to remove symbols from all surfaces at once. By default, Illustrator only calculates shading and lighting for the actual surface of a 3D object, and not artwork that is mapped to a 3D surface. Illustrator does this purely for performance reasons. We mentioned earlier that Illustrator uses blends to calculate shading, and breaking down intricately mapped artwork and shading each element with blends takes quite a bit of processing. However, in order to get a realistic appearance, most likely you will want your mapped artwork to be shaded, even if it takes a bit longer to do so. Checking the Shade Artwork (slower) check box forces Illustrator to shade both the surface of your object and the mapped artwork as well. This setting applies to the entire object, and you don’t need to turn it on for each individual surface.
Tip: It’s easier if you create your symbols at the correct size before you map them to a surface; this way, you won’t have to worry about getting just the right size or position in the Map Art dialog.
Note: A surface can contain only one symbol. If you want multiple art items to appear on a single surface, you have to define a single symbol with all of the elements in it.
The last setting in the Map Art dialog is a check box marked Invisible Geometry, which is a slightly technical term. When this option is turned on, Illustrator hides the actual 3D object on your artboard and displays just the mapped artwork. The result is a symbol that appears to float in space. A good example of when this setting might be useful is when you want to make text appear as if it were wrapped around a sphere. When you’re happy with your artwork mapping settings, click OK to accept the settings in the Map Art dialog and then click OK to close the 3D dialog.