[vtkusers] Problems performing off-screen rendering with vtk-5.3.x, Qt-4.5.x and Cocoa 64-bit libraries

[Elvis Dowson]

Hi,
          I have a problem performing off-screen rendering using vtk.  
I am using vtk-5.3.x, Qt-4.5.x and Cocoa 64-bit libraries.

The problem is that even if I set off-screen rendering off in the  
vtkRenderWindow, a small Cocoa window still appears.

		renWin->OffScreenRenderingOn();

How can I prevent this?

Best regards,

Elvis Dowson
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