[Paraview] Anti-Aliasing in SaveScreenshot

[Niklas Karcher]

Hi,
I am using the pvbatch tool to generate plots. I ran into an issue where 
the SaveScreenshot method used in the pvbatch python script apparently 
does not use any anti-aliasing (see Python.png attachment).
If I use the SaveScreenshot method inside of Paraview from the menu the 
result is anti-aliased. (see AA.png)

How do I activate the anti-aliasing inside of my python script that is 
run by pvbatch?
Thx for your help
Niklas
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