Rustic gymnasium building, earthy tones, reclaimed wood accents, exposed brick walls, industrial metal beams, natural ventilation systems, solar panels, green roofs, rainwater harvesting systems, eco-friendly materials, minimalist design, open-plan spaces, abundant natural light, soft warm lighting, shallow depth of field, 3/4 composition, panoramic view, realistic textures, ambient occlusion, regionalist architectural style, earthy color palette, organic forms, curved lines, integration with surrounding landscape, forest surroundings, lush greenery, blooming trees.