XGL features missing - I want one thing...

[Richard]

Hi,

I've got the cube working, dual monitor, etc.... With Ubuntu 7.10.
However, one feature I am missing from this wonderful piece of eye candy
is when you view the cube, the windows would move off the desktop as
separate 3D plates.  Kind of hard to describe.  When you then selected
the desktop of choice, the windows would move back...

Where can I get this, as it's not in the default options.

Rich