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UMG BackgroundBlur "Apply Alpha to Blur" functionality?

Hello, on the UMG Background Blur widget, there is a property called "Apply Alpha to Blur", however the description of it is quite vague: When true, this will modulate the strength of the blur based on the widget alpha.

You can't directly set the widget alpha, only it's fallback image alpha. Putting an alpha image as a child does nothing either.

How does this property work? Can it be used with a transparent image to create a masked blur?


Product Version: UE 4.21
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asked Nov 22 '18 at 12:18 PM in Using UE4

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avatar image piontek Jan 23 '19 at 01:34 AM

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