post-apocalyptic scene, underground fallout shelter, hidden secrets, rusty metal door, dim lighting, eerie shadows, survival equipment, canned food supplies, old maps, scattered documents, bunk beds, gas masks, vintage radio, leaking pipes, concrete walls, survivalist character, tattered clothing, cautious stance, exploring action, dusty atmosphere, cobweb textures, steel structure, survival gear, ambient occlusion, claustrophobic composition, muted color palette, moisture on surfaces, flickering light bulb, 3/4 view angle, atmospheric perspective.