Wall cobbling

[MustafaDamus1]

OK chiefs. How do I create cobbling on the wall (outside). I used frieze molding but I face a problem when I come to porch area. My molding disappears. I created the porch with invisible wall. See attached picture of what I want. 

Thanks 

[rgardner]

4 hours ago, MustafaDamus1 said:

OK chiefs. How do I create cobbling on the wall (outside). I used frieze molding but I face a problem when I come to porch area. My molding disappears. I created the porch with invisible wall. See attached picture of what I want. 

Thanks 

No picture.