FODU, Forgotten Dungeon, fodu_door, heavy medieval prison door forged from thick iron bars and reinforced metal plates, arched stone doorway built from massive weathered masonry blocks, short worn stone staircase leading to the entrance, dark passage hidden beyond the door, rough underground stone walls, scattered rocks and rubble piled beside the steps, cracked flagstone floor covered with dry straw, warm hanging lantern casting golden amber illumination, dramatic shadows across the stonework, cold subterranean atmosphere, ancient fortress dungeon architecture, realistic aged materials, rusted iron details, cinematic lighting, ultra-detailed textures, volumetric lantern glow, abandoned confinement chamber, high realism, moody medieval environment, secure dungeon entrance.