[Paraview] automatically export image from state

[Martin Genet]

Dear all:

I'm trying to use a small script to automatically load a state and create an image. Here it is:

> from paraview.simple import *
> servermanager.LoadState("toto.pvsm")
> SetActiveView(GetRenderView())
> Render()
> WriteImage("toto.png")

The script runs well, but the created file is all black except for the axes etc. I'm running Linux. Any help would be highly appreciated.

Martin