Adding overlays to an UI

[4JX]

Reference pic:

I'm looking for a way to get these types of overlays on egui. Area seems to be my best fit for them, but I feel using a whole area to paint something like the fade-out black overlay is somewhat overkill.

Is there a more primitive version I can use for the fade overlay (since all it needs to be is a rectangle that covers the window area)? And would a non-draggable Area be suited for the job in the UI containing parts or is there something else I can look into?

[emilk]

Area is your only bet right now.