That's an idea...i anyway already use tha clientData to pass an array that i need to use in the algorithm, so how could i pass tha actors too?? -- View this message in context: http://vtk.1045678.n5.nabble.com/Move-actors-inside-a-callback-function-tp4859295p4872037.html Sent from the VTK - Users mailing list archive at Nabble.com.