Mountainous penthouse, luxurious living space, lush green roofing, abundant plant species, natural insulation, energy efficiency, eco-friendly design, modern architecture, floor-to-ceiling windows, breathtaking mountain views, snow-capped peaks, misty valleys, rustic wooden accents, stone walls, cozy fireplaces, soft warm lighting, shallow depth of field, 3/4 composition, panoramic view, realistic textures, ambient occlusion.