Allow users to upload and add a corner shape texture. Basically it’s a gray-scale 1:1 texture that’s placed in the corners. It’d be great to add this option so we can have more than just round corners.
(And before people suggest 9-slice, I know it exists and how to use it, but you can make round corners with 9-Slice too. So why not add some sugar to this feature if we’re getting this as a replacement for 9-slice rounded corners anyways.)
Another addition that could be made is allowing players to specify specific corners to apply this to. Or a combination of corners. You could have a boolean flag for each of the 4 corners. Even better would be combining the two feature requests and allowing us to specify a texture for each corner individually. This would allow us to create very specific and complex UI shapes for our games’ needs.