    RibbonFilter = vtkRibbonFilter()
    RibbonFilter.SetInputConnection(PolyDataRead.GetOutputPort())
    RibbonFilter.VaryWidthOn()
    RibbonFilter.SetWidthFactor(5)
    RibbonFilter.SetDefaultNormal(0, 1, 0)
    RibbonFilter.UseDefaultNormalOn()
--
    rf = vtkRibbonFilter()
    rf.SetInputConnection(streamer.GetOutputPort())
    rf.SetWidth(0.1)
    rf.SetWidthFactor(5)
    streamMapper = vtkPolyDataMapper()
    streamMapper.SetInputConnection(rf.GetOutputPort())
--
    rf2 = vtkRibbonFilter()
    rf2.SetInputConnection(streamer2.GetOutputPort())
    rf2.SetWidth(0.1)
    rf2.SetWidthFactor(5)
    streamMapper2 = vtkPolyDataMapper()
    streamMapper2.SetInputConnection(rf2.GetOutputPort())
