"In order to make life easy, let us go through a few
pre-flight checks to ensure all is well once we enable
Compiz/Desktop Effects and start using it.
The Pre-requisites include
1. Proper drivers installed for your ATI or nVidia or Intel
2. Enable Composite for Xorg and the rendering engine that you
want to use like AIGLX,nVIDIA native for nVIDIA or XGL. Composite
is enabled by default in openSUSE 11.0" article links to several howtos -- ed.