Could I also use this technique to clip a scene to the path of a complex polygon? How does it hold up with many overlapping shapes of varying color; wouldn't i

Could I also use this technique to clip a scene to the path of a complex polygon? How does it hold up with many overlapping shapes of varying color; wouldn't it lead to far more state changes and ultimately much greater fill-rate? And what are your thoughts on using this for font rendering? This looks brilliant. Thanks for the info.