def mergeActors(actors, tol=0):
    """
    Build a new actor formed by the fusion of the polydatas of input objects.
    Similar to Assembly, but in this case the input objects become a single mesh.

    .. hint:: |thinplate_grid| |thinplate_grid.py|_
    """
    polylns = vtk.vtkAppendPolyData()
    for a in actors:
        polylns.AddInputData(a.polydata())
    polylns.Update()
    pd = polylns.GetOutput()
    return Actor(pd)