SCENE LOCK: static tripod camera placed at the center of an abandoned underground tunnel floor at chest height with a natural 35mm lens perspective looking straight toward the vanishing point; framing locked so the following landmarks remain fixed across all stages: a rusted metal service door on the left wall, a cracked concrete drainage channel along the right wall, a broken overhead cable tray hanging near the center of the tunnel, and a damaged wall pipe halfway down the right wall; dim underground lighting with faint daylight glow in the far distance. STAGE: abandoned tunnel in severe decay before restoration begins. DETAILS: cracked concrete walls, fallen debris piles along the edges, rusted pipes, broken lighting fixtures, dust-covered floor, puddles reflecting faint light, loose cables hanging from the ceiling, rubble scattered across the tunnel floor. NEGATIVE: no text, logos, or watermarks; no warped geometry; no new tunnel openings; no floating debris; no impossible reflections; no teleporting elements.