[vtkusers] render a huge point cloud, vtkPainter?

[Luca Penasa]

Hi everybody,
I am writing code for displaying a huge data set of vertexes (let's say 
more than 1e^6 points). I started rendering it with the 
vtkPolyDataMapper but the efficiency in rendering is not so good and 
interaction is slow. Using a LODActor actually improved the interaction 
but i think there could be some better possibility.
I am interested just on vertexes colored by a scalar field. I readed 
something about vtkPainter but i cannot find any good example.

Any idea for this kind of data set?
Any example on how to use vtkPainters?

Thank you


Luca Penasa