There is additional information.
I created two images in Photoshop as images for the UI. (test_00, test_01)
In the case of test_00, the display is strange.
In the case of test_01, the display is correct.
It seems that if you add even a small amount of semi-transparent black fill in Photoshop,
the display will be correct.
I’ll also attach a project file where you can check this. *You can replace the UI image with Blueprint.
DebugUE53_HMD.zip (320.0 KB)
The current method of test_01 can solve the problem, but it will become darker as a little black is mixed in.
If you have any fundamental workarounds, it would be helpful if you could teach me.