Found a bunch of cheap large pieces in a store and figured out how to make terrain out of em. Combining that with cardboard boxes for larger areas of elevation I think is gonna be a pretty cheap and easy way to get decent terrain.
Of particular note are the yellow walls. I think they're the unwanted part a kit series so the store had over a hundred of them for a few cents a pop. But I think lined up they make for an excellent scifi barrier!