I'm not sure if this is the right name for the effect, but the idea is that on Mac we often want to draw text with that "etched" look. Right now we do so by using a full blown drop shadow or blur effect, which is much more expensive than necessary and cannot be used on embedded at the moment due to the cost. However we could add a special effect which, instead of using Decora as its implementation, would do something much simpler such as re-render the text / shape using a different fill (white or gray or whatnot). We could specialize the implementation on Retina displays so it looks right, perhaps by also applying a scale to get it slightly blurry.

This will be new API.