If I use 120 Actors I get a frame rate of 12-14, but if I use more than 240 I get a frame rate of 7-9 And all the actors are loaded from STL/OBJ files Regards Kay -- View this message in context: http://vtk.1045678.n5.nabble.com/Control-VTK-frame-rate-tp5743876p5743887.html Sent from the VTK - Users mailing list archive at Nabble.com.