Thanks! I think you are right, it seems that now it show two hexahedrons. I will try now with a much complicated example and see if it works. Thanks again! -- View this message in context: http://vtk.1045678.n5.nabble.com/VTK-hexahedronal-unstructured-grid-tp5714868p5714887.html Sent from the VTK - Users mailing list archive at Nabble.com.