First off it's used to load js files and interact with C2's runtime. This isn't minifier friendly, but it should be possible to wrap it in a plugin so it will be.
The main thing done in this capx is to change the rendering of one instance of an object in an interesting way.
With webgl off: some arbitrary canvas drawing is done.
With webgl on: a 3d cube is drawn inline with the rest of the other objects (as opposed to only on the very top or bottom).
https://www.dropbox.com/s/oge5lmjwm5wpp ... .capx?dl=1
Maybe this will be interesting/useful to someone.