If you cannot find the hatch pattern you need, HatchKit can help you create it.
HatchKit 4 Trial Edition
HatchKit is the perfect viewer and editor for most CAD hatchpattern files.
Trial Edition provides licensed HatchKit 4 functionality with watermarked output patterns.
HatchKit 4 Fill Manager Trial for Revit® is included.
HatchKit Tutorials for Revit®
Fill template examples:Showing how to define custom fill templates with Revit® Detail Line elements, including arcs and splines: