Friendly 3D Cartoon Portrait

Create a close-up square portrait of a cheerful {argument name="subject" default="young adult man"} in a polished semi-realistic 3D cartoon style, similar to a high-quality animated film character. He has {argument name="hair color and style" default="short dark brown hair with faded sides and a neatly swept top"}, warm light-to-medium skin, large expressive brown eyes with glossy catchlights, thick brows, a trimmed mustache connected to a rounded goatee, and a broad friendly smile showing bright white teeth. He is angled slightly toward the viewer with his head tilted, filling most of the frame from chest to top of head. Dress him in a {argument name="shirt" default="white button-up plaid shirt with blue and gray grid lines"} layered over a plain white crew-neck undershirt. Use warm indoor lighting, soft facial shading, smooth skin texture, and shallow depth of field. Background: a cozy restaurant or café wall with reddish-brown rectangular bricks and dark mortar, plus a dark wooden booth backrest across the lower background, softly blurred. Composition should feel like a friendly social media profile picture, with no text, no watermark, no extra people, and no accessories.