Grey Box Showing up in Render

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I've been working on this clip for a few days and just finished and rendered when I noticed this gray box in the final render. I realized then that it was also showing up in the preview. I mustve missed it thinking it was part of a mask or something. I searched all over and couldn't find anything on it. Anyone know what this is/how to get rid of it? Thanks

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Rick Gerard

Community Expert

I see a corresponding black box in the ECP for Color Difference Key. That is where it is coming from. I don't know why it is there, but Color Difference Key is the last tool I would use to create transparency for that footage. Keylight or even Set Channels with Alpha set to Green would probably produce a better matte. It would help if we could see the actual footage you are using for the overlay, but I'm sure that Color Difference Key is the culprit.

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Rebecca25239271h8kvAuthor

Participant

Thank you for the reply, the issue was film grain.

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Andrew Yoole

Inspiring

Looks a bit like the preview window of some heavy effects like Film Grain, but we can't see all the effects you're using in the screengrab. Make sure the Output parameter of all effects is set to Final, Final Render etc.

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Rebecca25239271h8kvAuthor

Participant

Hi Andrew, thank you for the reply, the issue was indeed the film grain. I had no idea there was variation to the output parameter. Thank you!

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jonathanv94293016

Participant

Where did you change the output parameter. I am having the same problem and can't seem to get rid of it.

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