   using gl.glEnable( GL.GL_CULL_FACE) doesn't speed up anything
  Hello,i render my modell now with gl.glEnable( GL.GL_CULL_FACE) and the rendering speedin doesn't speed up at all? Why is that? Or I'm waiting a speed up effect, that doesn't exist?(I'm using indexed VBOs...)Thanks, sorry for my english...   
  There are no guarantees that culling improves performace. It may, but other other hand, it may not. There are no guarantees.   ;  Thanks...Sad to hear that, i thought, it will speed up my rendering :)   ;  it all depends on where you bottle neck is in your rendering routine (see the performance pdfs and vids in the Forum FAQ for details on how to find bottle necks)   