_bboxMapper->ImmediateModeRenderingOn();
_contourVtkActor->SetMapper(_bboxMapper);
_contourVtkActor->GetProperty()->BackfaceCullingOff();
_bboxMapper->ImmediateModeRenderingOn();
_contourVtkActor->SetMapper(_bboxMapper);
_contourVtkActor->GetProperty()->BackfaceCullingOff();