[vtkusers] OpenGL performance

[Daniela Sacchetto]

Hi everyone
Sorry for my numerous questions but I'm new in vtk and so I have several doubts.

I'm using vtkVolumeRayCastCompositeFunction (as I said in my other mails) to render a 3D volume. 
Is it normal that, when I move the mouse on my OpenGL Window, the image losses focus and resolution and takes a little time to return ok? Or is it a problem of my pc? Is there any way to improve my OpenGL performance?

Thanks
Daniela
 		 	   		  
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