Knocked this up over the last couple of evenings a 28mm scale wall section. It was a bit of an experiment using a large pack of cork bits used for making boulders for model railways and the like that my wife bought me last xmas. I decided to see if I could build wall sections from them.
The wall was just built up and stuck together with a bit of PVA. Then I painted it dark grey before lightly over spraying it in grey primer to create a "rocky" look. I then washed the whole thing in with a couple of shades of brown and green. The base is just painted brown, with brown flock and static grass. Couple of Empress Anglo Zulu guys for scale. All in all I like the effect and it was really easy, the plan is to knock up some more of these.