Messing about with the magic eraser, i erased the main building of the wooden barracks.doing so i erased the training ground and just left with the building.But with using the magic eraser it glitched and left a 3x3 empty space leaving part of the building transparent. Anyway messing about i place a boulder in its spot and raised the ground and i got an effect which could look like a mine...
It's a bit rough round the edges as i was only playing with it, But if any want wants me to post a quick tut on it i will happily, and i'm sure you great map creators will be able to tidy up the effect up and make it look awesome