I bought some roofing felt some weeks ago thinking I could make some use of it converting my necromunda terrain into 40k terrain. I cut out some suitable pieces and place my necromunda tiles on them as blocks. It worked quite well. I’ll add some detail to it later, like oil stains and “thin rubble”, I need to store it folded and for flexibility I want to be able to place the tiles anywhere. I’ve made some painting progress as well getting some colors on the cultist flamer, a leader and some kind of specialist for my kill team. Cheers!