So I'm lucky enough to be taking part in a Necromunda campaign soon, and I've made some terrain to use during it.
The contents of the first couple uploads, like this one, are based cardboard cutouts from the 2nd Ed. Warhammer 40k starter kit. I have the models from it, which I've painted, but that's for another time! I scratch built ruins and debris, which I mixed onto the bases to try and create an illusion of the destroyed structures depicted on the card as having been scattered in the form of wreckage around the base.