The capital of Longhornia

The capital city of the Grand-Duchy of Longhornia, called Longhornia, is almost ready for use.

I have additional paper houses to mount, three walls plus a breached wall to finish painting.

I need to:

• build the Glacis which normally surrounds all fortress walls.
• provide a way to depict the covered way, normally sitting right behind the glacis, and the ditch.
• Depict the city interior in some dirt colour.
• Have nice paved roads, leading to the city gates.