Please add an ability (or customization setting) to create rounded corners for the game interface.
It would help a lot to make smoother design in mods like FlatUI.
I believe you can just change the textures to achieve that, PNG format is known to contain alpha. They may not be clickthrough but that's not usually important for the couple transparent pixels. What would a setting do anyway, or how would that be enough to customize what kind of rounding you want? Radius, bevel strength etc.