    tone_mapping_p = vtkToneMappingPass()
    tone_mapping_p.SetDelegatePass(camera_p)

    if use_tonemapping:
        ren2.SetPass(tone_mapping_p)

--
    tone_mapping_p = vtkToneMappingPass()
    tone_mapping_p.SetDelegatePass(camera_p)

    if use_tonemapping:
        ren2.SetPass(tone_mapping_p)

--
    tone_mapping_p = vtkToneMappingPass()
    tone_mapping_p.SetDelegatePass(camera_p)

    if use_tonemapping:
        ren2.SetPass(tone_mapping_p)

