Damn that's a bummer. What about at least a way for the user to be able to change the background color? So that at least it's somewhat usable with window capture for people with green based designs without making most of their models dissappear?
Also one thing I noticed while playing around with it, the browser source seems to work best with only 2-5 assets selected at a time. 5 is when it starts to have a noticible delay.