Hi there guys,
Thanks to all of you for the kind comments,
The brick walls,
For the Stalingrad vignette I used the really cheap Tamiya birck wall set, I just cut out some bricks to give the irregular and damaged edge.
For the Berlin dio I used a piece of plaster and scribed the bricks with a little screwdriver, I decided to use the plaster because the Tamiya wall is almost impossible (for me at least) to give some realistic combat damage look.
The ground work
I first build up the elevations of the terrain with pieces of the white protective stuff that comes with Tvs, DVDs, VHS, I cut out many pieces and work the irregularities, then I pour a mix of earth form my backyard with PVA and the some water (it should look like mashed potatoes a litle more runny), plz sort out big rocks, leaves, branches, the mix has to be free of big stuff.
When still wet add anything you desire like bricks, broken balsa, rocks in various sizes, helmets, weapons, etc, hey I love rubble!
Hope to be useful,