I want to use CSS style - background-size:cover;

in my animation. The responsive settings dont allow for this effect anywhere so I was thinking of putting it in the _edge.js file but, I'm assuming, becasue the Stage is the parent it will fill but distort with the Stage?

I've watched the flexible design videos for Edge and Edge preview but neither cover the effect I want which is use in the Cod Drops example:

http://tympanus.net/codrops/2012/01/02/fullscreen-background-image-sli deshow-with-css3/

Would a separate CSS file work?

Cheers

Bret