    dataToStencil = vtkPolyDataToImageStencil()
    dataToStencil.SetInputData(mesh)
    dataToStencil.SetOutputSpacing(spacing)
    dataToStencil.SetOutputOrigin(origin)

    stencil = vtkImageStencil()
--
    pol2stenc = vtkPolyDataToImageStencil()
    pol2stenc.SetTolerance(0)  # important if extruder.SetVector(0, 0, 1) !!!
    pol2stenc.SetInputConnection(extruder.GetOutputPort())
    pol2stenc.SetOutputOrigin(origin)
    pol2stenc.SetOutputSpacing(spacing)
    pol2stenc.SetOutputWholeExtent(whiteImage.GetExtent())
--
    dataToStencil = vtkPolyDataToImageStencil()
    dataToStencil.SetInputConnection(stripper.GetOutputPort())
    dataToStencil.SetOutputSpacing(0.8, 0.8, 1.5)
    dataToStencil.SetOutputOrigin(0.0, 0.0, 0.0)

    stencil = vtkImageStencil()
--
    dataToStencil2 = vtkPolyDataToImageStencil()
    dataToStencil2.SetInputConnection(stripper2.GetOutputPort())
    dataToStencil2.SetOutputSpacing(0.8, 0.8, 1.5)
    dataToStencil2.SetOutputOrigin(0.0, 0.0, 0.0)
    stencil2 = vtkImageStencil()
    stencil2.SetInputConnection(reader2.GetOutputPort())
