Realistic night on camera flash portrait young woman

Realistic portrait photography, night on-camera direct flash snapshot texture, close to cool white high-exposure beauty effect: face and skin specifically brightened by flash, cooler and whiter than the environment, skin micro-contrast reduced, highlights soft and diffused, but eyebrows, eyes, lip shapes, and bone structure remain clear; vertical 3:4 aspect ratio, above-the-knee mid-shot composition, lower edge of the skirt cut off by the bottom of the frame, chest-high camera position direct shot, close-up small sensor deep depth of field, almost uniform clarity across the frame, subject slightly to the left of the center, occupying about 90% of the height, 10% negative space at the top, the right third of the frame given to a brick wall. The subject is an adult young woman (early twenties), single person, oval face, soft jawline, long straight black hair with eyebrow-length airy fringe, the main hair bundle falls along the right side of the frame from the shoulder to the waist, a thin strand rests on the outer edge of the left cheek; natural skin tone is light warm ivory, large area of pink blush on cheeks, tip of the nose, and under eyes, watery red-toned lip glaze. She is looking almost directly at the camera, iris roughly centered in the eye slit but slightly toward the left of the frame, showing slightly more white on the right side, upper eyelids slightly pressed not wide open, prominent "aegyo sal" (undereye bags), long drooping eyelashes, plain eyebrow shape; lips slightly parted, no teeth showing, narrow lip gap, strong moist highlights on both upper and lower lips, expression lazy and calm. She stands leaning her back lightly against the wall, weight on the leg on the right side of the frame, hips pushed out toward the right, upper body tilting toward the left, shoulder line forming a diagonal from low left to high right, head tilted slightly to the right; the hand on the left side is raised to chest height, thumb and index finger pinching the end of a blue plaid tie and pulling it outward to the left, remaining three fingers curled inward, the tie thus stretched into a diagonal straight line extending to the middle left, nails are silver-gray mirror-finish glitter manicured; the other arm hangs down along the body, the hand falling outside the bottom edge. Clothing is a slim-fit white short-sleeved shirt, a vertical ruching in the center front tightens the fabric over the chest and abdomen to fit the torso, collar unbuttoned two or three times, collar leaves naturally folded out, sleeves rolled up above the elbow, hem tied into a small knot at the waist, exposing the entire abdomen and navel; lower body is a low-rise blue-white-gray-yellow plaid pleated mini skirt, waistband resting on the hip bones, leaving a bare strip about a palm wide between the knotted shirt; shirt is thin matte plain weave fabric, skirt pleats are pressed knife pleats, under the direct flash each pleat's lit surface is bright and the backlit surface turns deep blue, a tiny light-colored embroidered mark on the chest but unreadable. The background is an outdoor corridor wall scene: the right third is a warm yellow red brick wall, clear white grout, with stains and color variations, two sets of white plastic switch panels side-by-side in the center-right; the left and top are dark metal doors and frames, a small area of deep red foreign language signs and a small blue text sign above the door, only for environmental detail; the leftmost edge reveals a corner of a warm brown circular object; background information is low, almost no depth. The sole light source is a hard flash from the front of the camera, no modeling light, the subject casts a sharp-edged dark shadow on the door panel on the left, a bright spot appears on the brick wall spreading to the upper right and decaying quickly, the top left corner is pushed to near total black. In terms of color, warm yellow brick wall is the main background color, saturated royal blue plaid is the only high-saturation control color, white shirt is the brightening color, black hair and dark door are dark anchor points, pink blush and lip color are accents, cool white skin contrasts with the warm yellow environment. In terms of texture, the facial features, tie plaid, and nails are the sharpest, followed by the shirt and skirt pleats, the brick wall texture maintains medium detail, only the dark parts in the upper left are underexposed losing detail with slight color noise and compression artifacts, retaining some real skin pore texture, no global soft focus, no shallow depth-of-field blurring. Avoid studio soft light and commercial-grade skin smoothing, avoid global high-key lighting up the background, avoid losing the action of the fingers pinching and pulling the tie to the left and the tension of the tie, avoid big smiles showing teeth or eyes looking away, avoid the bare strip between the waist knot and the low-rise skirt being misdrawn as a bodysuit or tucked in, avoid becoming an illustration or anime style. Add artistic handwritten text "ChenLin" in the bottom right corner as a signature.