How can I make Nemo windows and right click menu semi-transparent?

[rado84]

I downloaded and installed probably the coolest theme out there called Cinnamox-Rhino and it has some settings for transparency. It changed the menu and the panel to a very cool level of transparency (see the screenshot) but it can't do the same with the desktop/window right click menu and with the windows themselves. Is there any extension or any setting that can do that with the Nemo (it's called Nemo, if I'm not mistaken) windows background and also with the right click menus for a window? I looked into the Window application under "System settings" but there's nothing related to transparency.