I’ve been seeing a number of comments on this blog lately concerning the compiz fusion “cube” effects only setting up two workspaces and therefore only allowing more of a toggle option instead of a cube. I thought I would throw out the method I use to make sure I get the four-panel cube functionality.
Of course you’ll need to already have 3D effects enabled on a compatible video card. You may want to see my previous tutorials on using Envy for non-free drivers or Compiz-Fusion on Ubuntu 7.10 for more details.
Once you successfully have the 3D effects enabled and have compizconfig-settings-manager installed navigate your way to “System > Preferences > Advanced Desktop Effects Settings”. Click on “General Options” at the top of the list and select the “Desktop Size” tab. The first slider on that tab is for “Horizontal Virtual Size”. Change this from two to four and close the window. You should now have four desktop panes for use with a cube vs the two desktop panes as default.
I hope this works as easily for you as it does for me.