Ability to change the outline mesh face culling

Right now, the outline option is really streamlined to create outlines and nothing else. But actually, there are a lot of things we can do with a second pass of offset geometry.

One example of something I do is create really cheap and simple shadows for some of our in-game UI gizmos (like in the following screenshot).

The only thing missing is the ability to  specify if the outline is frontface culled, or backface culled.

I realize this is a pretty specific use, but I'm just throwing the idea around. There could be tons of other things we could do with this...

Cheers!