Vector Basemap Showcase - wavy lines for water/ocean in examples

ctalleygreenville

How did you achieve this wavy pattern in your examples in the Vector Basemap Showcase for the oceans (see below)?  I do not see the wavy line pattern option within the "Edit Layer Styles".  The only option I see when choosing a pattern are straight lines.

AllanLaframboise

If the style you are working with doesn't have this pattern, you can open mid-century, and export the pattern for the image, and then add (import) the image  into the style you are working with. You can also edit the style if you want while you have it exported.