Create a 3D model of a flat plane. The plane should be square-shaped with smooth, even surfaces. Ensure clean topology and a simple polygon structure, suitable for use in game engines like Unity or Unreal.

Create a 3D model of a flat plane. The plane should be square-shaped with smooth, even surfaces. Ensure clean topology and a simple polygon structure, suitable for use in game engines like Unity or Unreal.

highly detailed, aged concrete texture for an industrial valve room entrance. The surface should appear rough, weathered, and stained, featuring cracks, chipped edges, and dark grime buildup in crevices. Include patches of discoloration, mossy green hints, and damp streaks from water damage. The texture should feel old, neglected, and slightly damp, evoking an eerie and abandoned underground facility.