ruined highrise building 3d model

Create a realistic, high-quality, game-ready 3D model of a Highrise Building for a post-apocalyptic open-world survival game. Use realistic proportions, clean optimized geometry, and detailed PBR materials. Add natural wear such as dirt, scratches, rust, stains, fading, or weathering where appropriate, without making it overly destroyed. Photorealistic and grounded, not cartoon or stylized. No ground plane, environment, pedestal, floating parts, random text, or logos. Make it suitable for real-time use in Unity on PC, with a sensible bottom-centered pivot, correct upright orientation, and realistic scale.