[vtkusers] Forcing Render() in the new pipeline

[Ali -]

Hi,

You can see in thismailing list people talking about the forcing the 
renderer to render() in the 'new pipeline'; however, people also add the 
comment that they do not know how it works.

Assume an object instantiated from a class drived from vtkAlgorithm called 
'filter'. Calling filter->Modified() followed by filter->Update() does NOT 
refresh the render window. How is it possible to force Render() in the new 
pipeline?

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