Here's an irregular pentagonal bastioned fort. I'm around after step 8 for regular forts, but it's a lot different for irregular ones. This is just the dirty map of the first version. I'll experiment a bit with diferent bastion forms maintaining the main wall.

Click image for larger version. 

Name:	5P_IrrV1_Step8Dirty.PNG 
Views:	15 
Size:	61.3 KB 
ID:	126841