Caustic Alpha channel - how to make one?

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I have caustics working great but the alpha is unusable because the table geo that is catching the caustics is also in the alpha. If I phantom the table there is nothing to catch the caustics so they don't work.

I've tried using shadow matt but it doesn't work with caustics.

Am I missing something?

Thanks for any assistance.

I'm not good at building my own shaders (I'm still a beginner) so if that's what I need to do please explain how.

Stacy

my file is attached

Attachments:
Kitchen58forDerek.hipnc (4.6 MB)

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