- In the shader’s Control Window,
               click the Map button to the right of
               the Color parameter. The Texture Procedures window
               appears.
               If
                  you are planning to mask the label, continue with step 2.
                If you do not need to
                  mask the label, you can skip to step 4.
                
- In the Texture Procedures window,
               click the Stencil button.
               The Texture
                     Procedures window automatically closes, a Stencil texture
                  swatch appears in the Multi-lister,
                  and the Control Window displays the
                  texture’s parameters.
                
- In the Stencil texture’s Control
                  Window, click the Map button beside
               the Image field. The Texture
                  Procedures window appears.
            
- In the Texture Procedures window,
               click the File button. The Texture
                  Procedures window automatically closes, a File texture
               swatch appears in the Multi-lister,
               and the Control Window displays the
               texture’s parameters.
            
- In the Control Window,
               type the name of the image file you want to use as the label in
               the Image field, or click the Browse button
               and select the image file using the File Requestor.
               The image file is now
                  mapped onto the shader, and appears on the shader swatch in the Multi-lister.
                  By default, the image file covers the entire shader. However, you
                  can limit the area it covers by masking the label or positioning
                  it on the shader.