[vtkusers] Problem with lighting: Dark 3D objects, SetLightType() has no effect?

[Petru Pau]

My solution to this was to add another light source, somewhere to the "back"
of the object (I did not care about shades). Something like that:

            vtkLight light1 = vtkLight.New();
                light1.SetPosition(0,0,20);
                light1.SetFocalPoint(0, 0, 0);
            vtkLight light2 = vtkLight.New();
                light2.SetPosition(0,0,-20);
                light2.SetFocalPoint(0, 0, 0);
            renderer.AddLight(light1);
            renderer.AddLight(light2);

Hope this helps.
Petru