Adult in a Crewneck · Split Lighting

SUBJECT
One adult with short brown hair wearing a plain charcoal crewneck, facing the camera with a relaxed, closed-mouth expression; the head and shoulders belong to the same single subject.

COMPOSITION
An eye-level, frontal head-and-shoulders portrait with the face centered, both ears visible, level shoulders, and a small margin above the hair against a plain dark-gray background.

STYLE GUIDE
1. Shape & line
Keep the head facing straight toward the camera, with the nose bridge on the central vertical axis and both cheeks similarly wide; define the nose, lips, and jaw through natural contours rather than drawn outlines.

2. Color & light
Place the key light at image left, beside the subject at roughly eye height, so the image-left forehead and cheek are illuminated while the image-right half stays in deep shadow; let the nose cast its shadow toward image right and keep the light–shadow division close to the facial centerline, without a bright triangle on the shadowed cheek.

3. Texture & material
Retain gentle skin texture and small tonal variations on the lit cheek, with restrained highlights on the nose; render the crewneck as matte fabric with broad soft folds, and keep shadow-side texture subdued while preserving a faint readable eye and jaw.

4. Composition
Crop below the collarbones and give both shoulders comparable space; keep the background evenly dark gray and slightly lighter than the darkest facial shadow so the image-right silhouette remains readable without adding a rim light.

PRIORITY
Preserve the requested identity, count, action, composition and output settings. Apply the style rules within those constraints; a style reference must not replace the subject or layout. Within the style: Make the frontal face’s left-lit, right-shadowed division the clearest visual feature.

AVOID
Avoid turning the face, flattening the shadows with fill light, or adding a bright patch to the shadowed cheek.

OUTPUT
One realistic studio photograph in a vertical 4:5 aspect ratio, with no text, logos, borders, or watermarks.

SELF-CHECK
Confirm that both cheeks have similar width and the nose shadow joins the dark image-right half.