Use Matte Curves to adjust the luminance of input mattes.

To access the Matte Curves menu, use:
Timeline, then use ConnectFX (See Creating ConnectFX).
This node accepts a front, back and matte clip, and outputs a result.
The Matte Curves node processes gaps in clips set to No Media based on the input tab receiving the information.
| Input | Result |
|---|---|
| Front | Black frames |
| Back | Black frames |
| Matte | No media |