It is possible to output a matte for a selected media or for the entire scene. Use the Matte Output option box in the Media list to select between outputting no matte, a media's matte, or a scene matte.

To process a media's matte:

1. Select media from the Media list.
2. Position the timebar where you want to begin processing the matte.
3. Select an option from the Matte Output box.

   
   

   Select:	To Output:
   No Matte	No mattes for the scene or media (default).
   MediaMatte	A single media's matte. Grabs the media's processed matte and copies it directly to a frame buffer. Transformations to the media are not computed when processing the matte.
   SceneMatte	A matte of the entire scene for selected media. If you select multiple media lines in the Media list, and select Scene Matte, you can output a combination matte for the selected media. 3D Geometries and particles are also output.
   BlendMatte	A matte of the entire scene for selected media, but use the normal blend mode to respect a scene's transparencies.

4. Click Process.

   The newly processed matte is placed on the Desktop.