OK. You're 100% correct. Apparently I didn't understand the functionality of the vtkExtractEdges. Thanks for you quick responses. -- View this message in context: http://vtk.1045678.n5.nabble.com/Neighbours-of-a-point-in-a-mesh-tp1236245p4474506.html Sent from the VTK - Users mailing list archive at Nabble.com.