@dan, is there a reason that one cannot set a Background component to have rounded corners?
I can work around this problem by placing the background in a FLEX and then having the FLEX handle the corners, but this seems to defeat the purpose of the background. I can also do this by using the Tailwind classes, so there are ways to make it happen, just seems that it is incomplete not having it in the component itself.
It also needs the background overlay option. I’ve put it on the want list.
The Background is designed to be lightweight and focused.
The things you both want to do can be done by combining additional components (that’s the power of Elements).
@handshaper glad you figured out a workable solution 
@jenkman place a container on the inside of the background component, and style as needed.
Hope that all makes sense, if either of you get stuck, let me know and I can whip up a sample project 