Modern gymnasium interior, high-ceilinged spaces, large windows, natural ventilation systems, sustainable materials, recycled rubber flooring, shock-absorbing surfaces, bright color schemes, minimalistic design, open-plan layout, modular furniture, eco-friendly paint finishes, low-VOC emissions, durable steel structures, translucent roof panels, clerestory lighting, soft diffused illumination, 1/2 composition, realistic textures, ambient occlusion.