For those interested in the ruins shown in a previus post, here are some more pictures and details.
The basis was a pile of leftover Linka, that was too badly damaged to use for ordinary buildings. I based them in triangular modules so I could reconfigure them as needed in two shapes L and T. The L shapes is just a corner wall made of two pieces of Linka with broken end pieces added, The remains of the first floor was added from card and then a couple more broken Linka pieces was used to extend the wall upwards.
T shapes construction was broadly similar except the Linka was used to create a straight wall and the leg of the T was made from foamcore. Groundcover was filler mixed with gravel and topped off with matchsticks and small Linka pieces. Painting was grey car primer then a sand base shade for the outer walls and and a pale grey for the inside walls, The external walls were drybrushed terracotta to bring out the bricks. Inside the walls had a dirty wash and various other washes and dry brushes were applied to the rubble
All finished off with green doors and window frames plus some paper posters, which also served to hide some damaged pieces
An overhead view showing some possible configurations