Can keylight accept multiple outside masks?

When using keylight, one can supply an outside mask.

I have several regions I want to mask off as outside, but keylight seems to accept only one mask. How can I do this?

Currently I work around this by using thin strips of masks to connect several masks into one, but there has to be a better way.

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Community Expert

Create your masks, pre-compose moving all attributes, apply Keylight to the nested comp (the pre-comp you just made).

I do this all the time with shots that need significant roto before applying Keylight.

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