def setup_pipeline(self):
        # Create the components
        self.contour = Contour(show_filled_contours=False)
        self.normals = PolyDataNormals()
        self.actor = Actor()

        # Setup the actor suitably for this module.
        self.actor.mapper.scalar_visibility = 1
Override this method so that it *creates* the tvtk
dataset/ETHPy150Open enthought/mayavi/mayavi/modules/iso_surface.py/IsoSurface.setup_pipeline