There are three types of 3D objects you can create:
Standard 3D objects:
Objects created entirely within as 3D tool. See
Standard 3D Objects
.
3D Profile objects:
Objects created by performing functions on 2D profile objects. See
Profile Objects and Face to Face Modifications
.
Modified 2D objects.
2D objects that are assigned a thickness. See
Creating 3D Objects by Editing 2D Objects
.