Improve Unreal's origin BackgroundBlur widget, so that a mask texture (or material) can be applied to control the blur effect region.
Technical Details
Features:
Support applying a mask texture.
Support using material as a mask. (Updated 2022-10-10)
Support switching mask channels (RGBA) of the texture.
Support changing mask texture and texture channels in blueprint at runtime.
Demo level included for an example of integration.
