Candid Outdoor Waist-Up Portrait of Young Man in White Shirt in Park

A photorealistic vertical medium portrait in exact 720x900 proportions (4:5 aspect ratio), faithfully preserving the framing, composition, scale, and natural outdoor lighting of the reference image[span_0](start_span)[span_0](end_span). A handsome young man stands waist-up in a garden park, maintaining the original vertical 4:5 proportions, tree foliage headroom, lower waist crop, and subject-to-frame scale[span_1](start_span)[span_1](end_span). Faithfully preserve his recognizable facial identity: fair-to-medium olive skin tone, defined jawline, neatly trimmed dark beard and mustache, dark expressive eyes looking slightly off-camera to the left with a calm, gentle expression, and short dark brown hair with tight natural curls on top and faded sides[span_2](start_span)[span_2](end_span). He stands naturally facing forward, his right hand resting inside his trouser pocket, wearing a metallic link watch on his left wrist[span_3](start_span)[span_3](end_span). He is dressed in an untucked, relaxed, loose-fitting white button-down collared shirt with an open neck, single chest pocket, and sleeves pushed up to the forearms, paired with relaxed-fit dark charcoal or navy jeans; match the loose, relaxed, and roomy silhouette with natural fabric drape and realistic folds without making the clothing tight or slim[span_4](start_span)[span_4](end_span). The background features lush green park foliage, a prominent tree trunk on the left, and soft outdoor daylight filtering through the leaves, creating a soft, natural background blur[span_5](start_span)[span_5](end_span). Authentic skin texture with visible natural pores, sharp focus on the subject, natural color grading, 8K Ultra HD quality[span_6](start_span)[span_6](end_span). Insert discreet watermark in the lower right corner of the image, vertical text (rotated 90°), written "aipromptlabs.online", Calibri Light font, white color with low opacity (semi-transparent), medium size. Extreme sharpness on the face, fabric texture and typography of the letters. Shot on Canon EOS R5, 50mm f/2.8, studio light.