I love i3, but there's one thing I really wish I could do that I still hadn't figured out. I used to be a KDE user and I loved the fact that I could stack wind

I love i3, but there's one thing I really wish I could do that I still hadn't figured out. I used to be a KDE user and I loved the fact that I could stack windows and make the one on top semi-transparent. I'd be using this feature to watch movies while hacking in the terminal. The way you'd set it up is that you'd stack one window on top of another, set it to "always on top" and control its transparency through extra options unlocked in the title bar. Now, the question is, could i3 do that? In other words, does the "tabbed" mode actually "render" the windows underneath so that I could use an external compositor to set its transparency to whatever I want? Ideally I'd love to have a shortcut for that.