Solitary Snowboarder on a Vast Blue-Sky Slope

Photorealistic cinematic scene of a solitary snowboarder carving down a vast untouched snow slope beneath a clear blue sky. Low, behind-the-shoulder camera angle tracks the board as it cuts through powder, sending bright snow spray. The rider wears a vivid red jacket, black pants, white helmet and goggles, with a small backpack. The slope extends to a distant horizon of jagged mountains and sparse evergreen ridges. Crisp sunlight creates sharp shadows, blue-tinted highlights, and lens flare on the snow. Mood: serene yet exhilarating, embodying winter adventure. Rendered in ultra-high definition with HDR, realistic snow textures, subtle motion blur, and filmic color grading. Aspect ratio 16:9.