Here's my situation:
I run Compiz Desktop Cube, with Skydome enabled, on Kubuntu 10.10. I would like to 'disable' or make the KDE wallpaper completely transparent, making the Skydome my 'wallpaper replacement'.
Is there any way to do this?
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I'm not sure if it will work 100% perfectly, but you could use the Opacity, Brightness and Saturation Plugin to achieve something similar.
All you need to do is to add the desktop as a window to opacify and set it to 0%. (This answer supposes you have knowledge of configuring compiz plugins).
To show desktop icons, you will need to have the folder view plasmoid enabled.