[vtkusers] Making vertices "glow"

[David Doria]

Has anyone ever made points "glow"? We would like to do this to
indicate a selection in a better than "change the selected points to
red" type of way. Is there a particular combination of
diffuse/ambient/specular that would achieve an effect like this?

Additionally, can an effect like this be applied to of a subset of the
vertices in a vtkPolyData? The only way to know how to change
something like that is through actor properties
(vtkActor::GetProperty::SetDiffuse for example), but of course that
gets applied to the entire point cloud.

Any tips?

Thanks,

David