[vtkusers] wireframes??

[david michell]

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Hi everyone,
I have a vtkUnstructuredGrid and I managed to render the data as a surface.
I want to display the surface as a wireframe , i used 
vtkActor::GetProperty()::SetRepresentationToWireframe()
It works , but I have two problems, 
1) In the wireframe the backface is always black only the front face shows colour. I used TwoSidedLightingOn(), but this has no effect.
2) I want to change the width of the wireframe lines, how do I do that.

Please help me out.
Thank you all.
David Michell