Hi Marcos, What if you try adding the following line to your code ;) ui->qvtkwidget->GetRenderWindow()->GetInteractor()->Start(); Siavash -- View this message in context: http://vtk.1045678.n5.nabble.com/vtkImageViewer2-and-QVTKWidget-tp5733647p5733651.html Sent from the VTK - Users mailing list archive at Nabble.com.