Have just changed from Gutsy 386 to Gutsy 486 and am trying to set Compiz up again. Have gotten cube running fine by enabling Desktop Cube and Rotate Cube along with changing the Horizontal Virtual Size to 4, but cannot get the transparent caps, which were installed by default with first Compiz I installed back when I was running either Feisty or Dapper (don't remember which). Have tried both enabling and disabling Caps in the compiz manager program and playing with the opacity, but I'm having trouble figuring it out. Using Ubuntu's standard Compiz program, without doing anything wild like substituting for beryl, etc as I understand some people do. Want to keep system as "stock" as possible. I don't have a setting I can see for transparency. Used to be a really neat effect, whereby when cube was rotated, anytime top or bottom of cube was visible, you could look inside and see the mirror image of the desktops from their back sides as if they were semi-transparent. Many thanks.

Have you installed the CompizConfig Settings Manager (ccsm)?
I have caps as an option. There are pics by default, but I guess you can remove them.

I also have compiz-plugins and compiz-fusion-plugins-extra installed. I don't recall installing them, but maybe I did. Check if you have them.

Thanks for reply Oskar. Yes I do have them all installed. But I don't know how to get the top and bottom caps (either enabled or disabled) to show up as anything but an opague solid colour. I tried cutting all the opacity settings back to zero, but that only made the caps black.