Thank you for the reply,
unfortunately the progress bar is not what I'm looking for, that is basically like a regular sliced sprite. The sliced sprite has a black border so I want to mask off one half without showing the border, but keep it on the other half.
I'll look up the clipping tutorial you mentioned. I don't want to use an additional panel because I dont want to have another draw call. I was looking into extending slicedSprite and adding the same functionality as the filled sprite, but I couldn't get it to work.
Thanks