A 3d rendering of a modern wooden and metal shelving unit with four shelves. The unit has a sleek, minimalist design with a dark wood finish and a black metal frame. The shelves are arranged in a vertical manner, with the top shelf being slightly higher than the bottom shelf. The top shelf has a smooth, polished finish, while the bottom shelves have a more rounded shape. the unit is positioned in the middle of the image, with a plain, light-colored wall in the background. the overall aesthetic of the piece is minimalistic and contemporary.