Deep within the subdecks and shadowed arterial corridors of the Ignis Aeternus, the voidship’s lower guts sprawl like a rusted iron hive — a labyrinth of corroded metal, hydraulic veins, and ceaseless rumble. The lowest decks house essential systems: plasma conduits, atmospheric converters, and void-seal bulkheads. Yet it is the towering weight of upper-deck machinery — recoil chambers, anchor servos, and macro-battery supports — that defines the space, pressing down like the bones of a buried giant.
The hum of motive power is constant. Pistons thunder. Machinery groans. Flickering lumen-strips cast pale light on soot-stained walls and oil-slicked floors.
Within this industrial underworld, tens of thousands of menials live and toil. Most never leave their assigned service stations. Crude shelters and makeshift habs cluster along maintenance shafts and access corridors, forming a patchwork society shaped by necessity and duty. Over time, several shanty towns have grown around key resources:
Baylock Warrens: Built into the crawlspaces of a secondary cargo bay, dense and industrious.
The Churnside: Beside a vast waste churn and reclamation vat, the air is thick with ammonia and stench of rot.
Reservoir Verge: Located near a water cistern, this settlement enjoys slightly cleaner conditions.
Ignis Aeternus WH 40K campaign notes 