3D Compositing with Action > Action: Sources >

# Replacing the Front or Matte Clip

When working with source nodes, you can replace the media's front and matte clips with the front, matte, or a combination of the front and matte clips from other media. These changes can be made in the Source menu, or from the Sources tab in the Object Image menu of the image attached to the source node.

To replace the media's front or matte:

1. Double-click the source node in the schematic.
2. In the Source menu, change the source node from Matte to Front or vice versa.
3. Enable Override.
4. Select the type of source from the Source Type box.

   You can also change the source type in the Object Image menu for an image parented by a source node. The source type set in the Object Image menu is independent of the source type set in the Source menu for the parent source node or nodes.

5. If you selected Custom, select the clip to use as the front and matte from the image parented by the source. You can select Front, Matte, or White for each.

   For example, if you select F: Matte and M: Matte, only the matte of the source's child image is rendered and used. A summary of your choice can be seen under the image node in the schematic. In this case you will see (MM).

   NoteYou can combine multiple parent sources each with their own override setting.

Source Settings

Source box
  Select a Front or Matte source.

Override button
  Enable to override a source node selection on the parent source.

Source Type box
  Select a source type. When selecting Custom, you can also designate a Front and Matte type in the boxes below.

  Select: | To:
  --- | ---
  Front only | Set the source to use only the front of the selected surface; the matte will be replaced with white (displayed as FW under the selected surface in the schematic).
  Matte only | Set the source to use only the matte of the selected surface; the front will be replaced with white (displayed as WM under the selected surface in the schematic).
  Custom | Set the source to have all the options of replacing the front and the matte of the selected surface by White, original Front or original Matte.

Front Type box
  Select the clip to use as the front from the image parented by the source.

Matte Type box
  Select the clip to use as the matte from the image parented by the source.

Source View box
  Select which source to view in the image window. See Viewing a Source Node.