Rustic gymnasium, regionalist architecture, earthy tones, natural stone walls, reclaimed wood accents, exposed wooden beams, large windows, clerestory lighting, solar panels, green roofs, rainwater harvesting systems, eco-friendly materials, minimalist design, functional spaces, athletic tracks, sports equipment, locker rooms, showers, changing areas, spacious corridors, abundant natural light, soft warm ambiance, shallow depth of field, 3/4 composition, realistic textures, ambient occlusion.