3D Desktop in Compiz

I want the yellow surfaces to be an workspace ( see picture ) On the both sides.
http://img509.imageshack.us/img509/2...eenshotch2.png
What I can remeber it's possible

Is there any values here to change? ( see picture )
http://img520.imageshack.us/img520/6...aceswitdg1.png

Maybe it's something here?

http://img238.imageshack.us/img238/3...configium3.png

I don't think you can do that at least right now, maybe in the future version, who knows.

Are you sure?