When I use SetOffScreenRendering(1), the RenderWindow is outputed into the frame buffer object, so I can get data from it i.e. using opengl ? -- View this message in context: http://vtk.1045678.n5.nabble.com/vtkRenderWindow-off-screen-rendering-tp5736134p5736285.html Sent from the VTK - Users mailing list archive at Nabble.com.