User Manual

Clicking the second half of a connection to disconnect it (top),
and the result with the text node disconnected (bottom).
Connecting a MediaIn2 or Loader2 node onto the Merge1 node’s foreground input causes the
entire viewer to be filled with the MediaIn2 (assuming we’re still viewing the Merge node). At
this point, we need to insert the Text1 node’s image as an alpha channel into the MediaIn2
node’s connection, and we can do that using a MatteControl node.
The updated composite, with two video images connected
and the text node disconnected.
Using Matte Control Nodes
Select the MediaIn2 node, and click the Matte Control button in the toolbar to add it between
the MediaIn2 and Merge1 nodes. (To tidy up, I’ve moved the nodes around a bit in the
screenshot.)
The MatteControl node has numerous uses. Among them is taking one or more alpha channels,
mattes, or images that are connected to the Garbage Matte, Solid Matte, and/or foreground
inputs, combining them, and using the result as an alpha channel for the image that’s connected
to the background input. It’s critical to make sure that the image you want to add an alpha
channel to is connected to the background input of the MatteControl node, or the MatteControl
node won’t work.
The second image properly connected to the
MatteControl node’s background input.
Chapter – 70 Compositing Layers in Fusion 1420