[Paraview] PV 4.1.0- mesh shows on the contour plots

[Stephen Wornom]

When I have a coarse mesh, the contours are smooth and the mesh does not show. 

When I use a fine mesh, I see the mesh on the contours. 

Is this due to a lack of precision when the PV files are written? 

Is there an option to avoid seeing the mesh on the contours? 

Hope my question is clear, 
Stephen 
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