Glowing Unicorn in Castle Garden - 3D Render

Photorealistic 3D render of a pristine white unicorn with a spiraled horn and iridescent mane, standing in a lush castle garden. The garden features manicured boxwood hedges, a marble fountain with spray, ancient stone archways, ivy-clad castle walls, and distant towers. Golden-hour sunlight filters through the trees, creating warm light, volumetric fog, and soft, long shadows; subtle sparkles swirl around the unicorn. Realistic fur with subsurface scattering, a glossy, softly glowing horn, and a shimmering, wind-swept mane. Use advanced CGI rendering with ray tracing, global illumination, ambient occlusion, depth of field, and bloom on water and lights; caustics from the fountain. Camera positioned at a low angle with a wide-angle lens (35-50mm) for a heroic view, 4K resolution, crisp textures, high detail. Rich greens, warm golds, and cool stone tones, cinematic composition, slight vignette for focus.