Closed-Mouth Adult · Lip-Plane Shading

SUBJECT
One adult with short straight hair, a relaxed face, and gently closed lips; the upper and lower lips meet naturally without pressing together.

COMPOSITION
An eye-level, nearly frontal head-and-shoulders portrait in a vertical frame; keep the entire head visible and the mouth large enough to read its plane changes.

STYLE GUIDE
1. Shape & line
Build the lips as two curved volumes: give the upper lip a shallow central bow and the lower lip a fuller central arc. Draw a thin, uneven contact line, darkest near the corners, and let the outer lip boundaries emerge from adjacent color changes.

2. Color & light
Place a broad soft light above and toward image-left. Make the downward-facing upper lip a muted dark rose and the upward-facing lower lip a lighter warm rose, with a soft highlight left of its center and a short shadow directly beneath its central bulge.

3. Texture & material
Use matte digital painting with soft brush transitions across skin and a few faint vertical marks on the lower lip. Keep those marks subordinate to the broad shading, and soften the highlight into the lip color so the surface feels supple.

4. Composition
Center the face against a quiet gray-green background and crop below the collarbones. Keep the hair and plain cream shirt in broad simple masses, while giving the mouth the clearest local value changes so its volume remains readable within the whole portrait.

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: Prioritize lip volume through plane shading and a restrained contact line.

AVOID
Avoid a uniform dark lip outline or a hard white highlight.

OUTPUT
One image, 4:5 aspect ratio, with no text, lettering, signature, or watermark.

SELF-CHECK
Check that the lower lip reads as fuller and lighter than the upper lip while the mouth stays relaxed.