I tried vtkAppendFilter and his output is empty, I tried vtkImageAppend and vtkImageAppendComponents , both returned 1 single imagedata but wrong. -- View this message in context: http://vtk.1045678.n5.nabble.com/Merge-vtkImagedata-tp4738197p4738246.html Sent from the VTK - Users mailing list archive at Nabble.com.