dieselpunk mechs in shape of dragonfly that look like Dragonfly, inside an gigantic underground concrete doom hangar, interior structure, drains, storm drains, jungle, vines, algea, cables, panels, walls, ceiling, floor, doors, brutalist architecture, intricate ink drawing, highly detailed in the style of Ashley Wood, moebius and Tsutomu Nihei, photorealistic, cinematic, intricate detail, well lit,