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PRIORITY COMPOSITION AND EXPOSURE, these constraints override defaults: This is a dim, almost-night photograph with predominantly dark cobalt blue snow and nearly black horses, not a brightly exposed winter photograph. Keep central horse head relatively small: mane top at34% frame height, forehead star46%, muzzle63%, head width only20% of frame. The LEFT horse is taller in the image, its mane top28% and muzzle46%, so left head is distinctly ABOVE central head. Do not raise or enlarge the central head to dominate the upper third. Right principal horse head top37%, muzzle61%, separate white forehead star with a DARK bridge of nose, no continuous blaze. Valley lowest skyline at23%, sky largely smooth muted deep blue, distant background defocused. Snow along bottom is blue with fast diagonal streaks and strong motion blur, not bright white frozen snowballs. Treat wet coat as near-black silhouette masses with sparse blue highlights, retaining considerably less shadow detail than a conventional HDR photo.
Portrait 2:3 cinematic winter photograph, four dark horses galloping directly toward a very low camera through deep blue snow at dusk in a narrow alpine valley. Preserve the asymmetric tightly cropped herd composition: the dominant black horse is centered at x48%, its wild mane begins near y34%, white irregular forehead star at y46% continues as a long narrow white blaze to its pale muzzle at y63%; chest fills x34–65% around y70%, forelegs plunge toward and beyond the bottom edge. A slightly smaller dark brown horse at x23% is set a half step behind, its mane reaches y28%, mostly black face with a short irregular pale marking around the nose, feet near y88%. A third brown horse at x75%, head between y37% and y61%, has a broad white forehead star and pale muzzle, black mane flung toward the right. Only part of a fourth black horse enters along the right edge, cropped by the side from ears near y31% through its chest and legs at the bottom. No rider, saddle or tack.
The upper third is a cold distant landscape: blue-gray cloudy twilight sky occupies the top quarter; snow-streaked mountain slopes descend steeply from both top sides into a central V-shaped valley whose lowest skyline lies at x49%, y23%. The right mountainside is an almost-black diagonal mass with thin blue snow bands. A bare tall slender tree rises at x24% from behind the left horse almost to the top border. Tiny isolated warm amber village lights sit near y31%, with one brighter pinprick at x50%, y33%. Background mountains and tree are softly defocused; horses' heads, messy individual mane strands and glossy fur are sharply detailed. The snowy trail is thrown into chaotic spray around hooves, bright icy flecks and streaks in the lower half, softly motion-blurred foreground spray but crisp central face.
Lighting is predominantly very dim cold cobalt ambient light from the overcast sky, deep near-black horse shadow masses, restrained blue reflected highlights tracing forehead, chest and wet black coat; thin subtle warm amber rim glints touch flying mane tips, never a large orange light source. Strong exposure separation: dark horses against mid-blue valley, brightest large light shapes are lower-left snow spray and thin white facial markings. Photorealistic anatomy, wet coarse fur, tangible snow crystals, filmic contrast and slight natural grain. Full bleed composition. No text or graphic overlay.
Negative constraints: no fifth horse, no pale or white horse, no rider, no harness, no upright static pose, no daylight, no sunset orange sky, no broad white sky, no symmetrical lineup, no entire distant tiny herd, no empty lower foreground, no painting, no fantasy glow, no text, no watermark. Retain exactly three substantially visible faces plus one right-edge partial horse.
Negative prompt
See targeted negative constraints within prompt.