    tcoords = vtkImplicitTextureCoords()
    tcoords.SetInputConnection(aSphere.GetOutputPort())
    tcoords.SetRFunction(quadric1)
    tcoords.SetSFunction(quadric2)

    aMapper = vtkDataSetMapper()
--
    tcoords = vtkImplicitTextureCoords()
    tcoords.SetInputConnection(sphere2.GetOutputPort())
    tcoords.SetRFunction(planes)

    outerMapper = vtkDataSetMapper()
    outerMapper.SetInputConnection(tcoords.GetOutputPort())
