Thanks for the replies. In the meanwhile I used the post in the wiki about compizfusion.
Selecting the windows manager with richtclicking doesn do the trick. Itś already selected.
typing 'compiz-start' in a console gives me error messages:
In the terminal is says:
Using KDE decorator
Starting Compiz with: --replace ccp --sm-disable
compiz (core) - Fatal: No composite extension
X Error: BadDrawable (invalid Pixmap or Window parameter) 9
Major opcode: 158
Minor opcode: 4
Resource id: 0x0
X Error: BadDrawable (invalid Pixmap or Window parameter) 9
Major opcode: 158
Minor opcode: 4
Resource id: 0x0
A new error window opens and says:
Compiz cannot be started. Please check that you have a working and supported Video Card, OpenGL functionality or visit Sabayon Linux Support forum at:
http://www.sabayonlinux.org/forum
GPU: ATI Technologies Inc RV350 AS [Radeon 9550]
Beryl worked OK in 3.4 loop3. I sure hope I don have to revert to 3.4 loop3 to het the 3d desktop working. Any ideas?