[vtkusers] Set light Intensity

[ameloush]

You could try this :

  vtkSmartPointer<vtkLightCollection>  col =
vtkSmartPointer<vtkLightCollection>::New();

    col = ren->GetLights();
        int i=col->GetNumberOfItems();  // to be sure there is at list one
light
    light = (vtkLight*)col->GetItemAsObject(0);
    light->SetIntensity(10);



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