I am trying to write a stl file with the Wall shear stress. I read that it is possible with paraview. First it is necessary to extract the surface and then triangulate it. I have done both steps and in the data of both I can see the Wall Shear stress and other variables. However, once I save the data as stl I can only see the geometry and the cellNormals, but the Wall shear stress and other variables are gone. Could you guys provide me with some information?