Is is possible to render ONLY Compiz with Unity3D using llvmpipe?

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http://askubuntu.com – Basically, I have very poor 3D performance on everything OpenGL when using Unity3D. GLXGears gives me an average fps of 33FPS on Unity3D, while using Unity2D gives me an average of 58FPS. So, I was wondering if it's possible to load just Compiz and Unity3D using the llvmpipe software renderer, while still being able to have hardware accelerated OpenGL for everything else, to keep my FPS up, so I can play my games. My graphics hardware is an ATI RS480. I'm using the stock Ubuntu drivers with the extra DRI package installed, as I've found out that using Oibaf's Graphics PPA screws everything Ope (HowTos)