Inner Bezel you meant? It’s always there since the beginning.
The new params are these:
These new params can be seen being used in this particular screenshot. See how the bezel outline curvature is slighty less curve than the content. I used the modifier param to decrease curvature in the bezel.
The second param can be seen too. As you didn’t notice, the bezel isn’t transparent, but the outer bezel is and it was slightly increased to smooth the bezel outlines so that it blends better with the overlay.