vtkTubeFilter tube = new vtkTubeFilter();
tube.SetVaryRadiusToVaryRadiusByAbsoluteScalar();
tube.SetInput(cleanFilter.GetOutput());
tube.SetNumberOfSides(20);
tube.CappingOn();
vtkPolyDataMapper mapper = new vtkPolyDataMapper();
mapper.SetInput(tube.GetOutput());
mapper.ScalarVisibilityOn();
mapper.SetScalarModeToUsePointFieldData();