UNCI, 3ng1n3h4ll, engine hall, the highest gantry onto giant pistons and interlocking machinery, colossal pistons and flywheels in sharp stillness, steel catwalks spanning a glowing machinery pit, hanging chains and steam, steel catwalk grilles above the machinery pit, red and amber furnace light from below, red and amber palette, art-deco underwater city, geometric brasswork, black marble and brass architectural accents, warm golden windows against deep blue water, riveted steel, drifting bubbles outside sealed ocean glass, photorealistic cinematic, filmic gold-against-abyss color grading, sublime deserted dieselpunk grandeur