A wild horse galloping across misty amber dunes at sunset, traditional watercolor painting, loose wet-on-wet washes depicting golden sand ripples and sparse dried grass, warm burnt sienna and soft coral tones of fading daylight, cool violet and steel gray shadows creeping across the landscape, visible bold brushstrokes capturing the horse's flowing mane and powerful muscles, paper texture visible throughout, plein-air painting aesthetic, fierce untamed mood, dynamic diagonal composition with dust clouds trailing behind