If these final spill suppression operations have changed the final compositing results, you may have to return to earlier operations to clean up the matte. If the composite view looks good, it is a good idea to go back and take a final look at the alpha channel view. Sometimes in the Primatte operation, a 100% foreground area (all white) becomes slightly transparent (gray). You can clean those transparent areas up by using the Matte Sponge tool.
| 1. | Select the Matte Sponge tool in the operation dropdown menu. |
| 2. | Click on the transparent pixels and they become 100% foreground. All of the spill-suppression information remains intact. |
NOTE: The Matte(+) operation also works to solve this problem. For more information, see Sampling Tools.