Is it possible to override the texture used in command buttons for the background? I was able to position and resize everything, but I can't seem to figure out how to change the background images on the buttons. The image definitions are defined in GameButton/GameButtonTemplate -> GameButtonBorderImage, NormalImage, HoverImage. Nothing I do seems to change these textures though.
[Edit] If anyone is trying to do this, it can be done by adding an overriding assets.txt with a reference to your texture.