3D Model: "Generate A 3D-rendered Image Of A Modern Sculptural Bench Made Of Repeating Triangular Or V-shaped Slats. Each Rib Should Be Slightly Rotated To Form A Concave Seat And Convex Backrest, Creating An Hourglass-shaped Silhouette. The Material Should Appear As Smooth, Light Gray Concrete Or 3D-printed Plastic. The Bench Should Cast Shadows On A White Background, Showcasing Its Parametric, Modular Design Suitable For Digital Fabrication."