sustainable design exterior shot render a modern two story building with a slanted roof and extensive use of glass windows the exterior walls should be a combination of natural wood in a light oak shade and polished concrete in a neutral gray tone the upper section of the building features horizontal wooden slats in a rich dark brown color the roof has a natural wooden texture matching the slats the atmosphere should be bright and sunny to highlight the building s modern design with a clear blue sky and few scattered clouds surround the structure with a clean paved ground in a light gray color incorporate a few minimalist modern planters with lush green plants around the building to add a touch of nature and vibrancy architecture