Extruding Polygon Faces
Maya 8.0 Tutorial
How to Extrude Polygon Faces in Maya
Starting with a simple polygon object, you can extrude the faces to add more geometry. This technique is quite helpful in creating a basic structure that can be converted to a subdivision surface to create a smoother, more organic shape.
Add a polygon cube to the workspace. Set the x, y and z divisions to one. (Create > Polygon Primitives > Cube).
Switch to the Component Mode and activate the Face Selection. To select the top face, click the center of the face.
Choose Edit Mesh > Extrude. Notice the arrows and scale boxes now available.
Click and drag the arrows (to move) or the scale boxes (to scale) the new geometry.
Press g to accept the change and begin another extrusion. To exit, press the q key to return to the Select Tool.