Dark Mechanicus Chemical facility
Above- The Interior of a Dark Mechanicus chemical weapons facility. Such sites were used to provide the Stygian Empire with a variety of chemical weapons that were used through the Stygian Wars. They also supplied the Stygian Empire's Alpha Legion Overlords with a large stockpile of these weapons.
The room and the small computer console are from the Spartan Scenics line. The chemical vats are from armorcast.