so there I was, with my trusty Proxxon Hot Wire cutter and a pile of blueboard.........
how many of my crazy stories start like that?
first step was to cut out some "ruined" looking wall bits
careful cutting meant that I could use both sides of the board
they looked the part, so I kept going
all sorts of interesting shapes
but three times as thick as I desired,
so I sliced them all like bread and ended up with three times as much ruined wall
at this point I decided to test-fit them to see how they looked
suitably ruined enough for me
but, you can't knocked down buildings without having rubble
so I made a ton of rubble