The volume rendering is not displayed, even if the property "volume rendering" is set "true". Though, the surface of the lung (vtk-dataset) is shown.
The following error message occurs:
ERROR: In ..\..\VTK-src\Rendering\vtkLODProp3D.cxx, line 908
vtkLODProp3D (000000000460E7B0): Index out of range!