【UMG】Background Blur not working at all

Wori3 · October 31, 2025, 1:21pm

UMG Background Blur makes the area completely black instead of blurred.

Possibly because I’m using a Mac, or Maybe I’m setting it up in a wrong way.
The image below shows a test widget. It looks the same in PIE.
Confirmed in 5.5.4 and 5.6.1.

Any help would be much appreciated.

3dRaven · October 31, 2025, 1:58pm

You can try using the overlay node. It might fix the bug. No problems on windows

pie

Wori3 · October 31, 2025, 11:27pm

Thank you for the answer.

Tried it, but didn’t fix the problem.

I’m convinced that it is a Mac issue.

PancakeTiger · November 29, 2025, 5:05am

I’m also seeing this bug on a Mac. Background Blur is fully opaque if Blur Strength is greater than 0. It’s basically binary alpha. Unreal Editor Version: 5.7.0-47537391+++UE5+Release-5.7, Platform: macOS 26.1 (arm64)

RemiZuma · April 23, 2026, 4:43pm

Im running latest Unreal 5.7.4 on a Mac and I also see this issue. Anyone found a solve for this?

Lara.Pur · May 12, 2026, 2:57pm

I also ran into this problem, I couldn’t fix the background blur feature, however if you place an image box, arrange the hierarchy so it’s at the back and stretch it to fill the screen (anchor it to the centre) and then make the colour black or white and change the transparency, it achieves almost the same effect. Hope this helps in some way.