Transform the portrait into a big-head caricature while maintaining realistic textures in the face. The head is disproportionately large compared to the body, which remains small and simplified. The facial features are exaggerated, with big, round eyes, an oversized nose, and a wide smile, but the skin retains detailed textures for a semi-realistic finish. The style is cartoonish but incorporates a touch of realism in the textures of the skin, hair, and clothing. The background is a simple, soft gradient to keep the focus on the caricature. Lighting is natural, with soft shadows to give the face a sense of depth. Photoshop effects: HDR Effect to enhance texture, Dodge and Burn for depth and shading, and Digital Painting for smooth, professional-looking facial exaggerations.