公园波浪形水泥长椅

Create a single, organically shaped concrete park bench inspired by the uploaded photo of a clay maquette. The bench features smooth, continuous curves resembling a gentle wave. Its material is light grey, exposed aggregate concrete, showcasing a rough yet refined texture. Ensure the proportions are suitable for public seating, robust and durable. Generate a high-polygon model with accurate PBR textures. Focus on solid construction and clean geometry. Avoid background, ground plane, multiple objects, text, floating parts, or surrounding landscape elements.