Sony Vegas masking error

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why no work.jpg

I am trying to get a mask working but the mask wont work in the preview window. I need help

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https://imgur.com/a/0qMrAu7

better screengrab

also the screen turns red when I leave it

[bouldersoundguy]

I suspect you may need to copy the track and apply the mask to the top layer and the blur to the lower layer. That's assuming you want the person in the foreground to be sharp and the background to be blurred.

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I want the guy to be sharp and the background to be gone

[bouldersoundguy]

Try switching "Apply to effects" from Yes to No.

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doesnt work 😐