Surface Renders Jagged

Hi all

Currently experiencing a strange error on a surface. The surface itself appears fine in terms of control points and in wireframe, but renders extremely jagged and hard edged. Smoothing does not seem to fix the problem. Any help would be appreciated!

Surface Issues.3dm (4.3 MB)

Your object is gigantic for the units (mm). This will make it hard to get a good mesh.
Try first resetting your model units to meters, then you will still need to create some custom mesh settings…

I used these:

To get this:

Thank you, but I don’t really understand - even if I scale this down by 100 it still appears jagged - is there some edge break sort of setting that I don’t understand?