Hello: Try this (in tcl) vtkRenderWindow renWin renWin AddRenderer ren1 vtkWindowToImageFilter renimagen renimagen SetInput renWin vtkJPEGWriter jpg1 jpg1 SetInput [renimagen GetOutput] jpg1 SetFileName filesalida.jpg jpg1 Write -- Jose Luis Pina jlpina at ivo.cps.unizar.es