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