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Adjusting Transparencies with Patches

When keying transparencies, the transparency is sometimes either not visible enough or too prominent in the final composite. You can use patches to lighten or darken transparencies.

To adjust a transparency using a patch:

1. Use the basic keying technique to get the transparency as soft as possible.
2. Sample a patch in the transparency. See Adding a Patch.
3. View the final composite by displaying the CurResult view.
4. Do one of the following:
   - To lighten the transparency, set the Colour of the patch to 0 and the Opacity to 100, then lower the Opacity.
   - To darken the transparency, set the Colour of the patch to 100 and the Opacity to 0, then raise the Opacity.