[UE5.1] Widget render opacity broken when using border with rounded corners.

[Roy_Wierer.Seda145]

This does not create a 10 (or any) pixel rounded corner for a shape X 50 Y 200 because it is in UV space, not pixel space.

As you would do in CSS:

.myelement {
    width: 50px;
    height: 200px;
    border-radius: 10px;
    border: thin solid #fff;
}