Art style: 3D Pixar.
Close up of the little sister looking frustrated, holding a pencil over an open math notebook, warm lighting highlighting her face, shallow depth of field
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FINAL STYLE ENFORCEMENT (this is the authoritative rendering directive — it overrides any style wording elsewhere in the prompt):
Render this image entirely in "3D Pixar" style. Match the lighting grammar, material response, colour science, level of realism / stylisation, line weight, and shading model typical of "3D Pixar". Keep the subject, composition, camera angle, lighting direction, and colour palette from the description above — but EVERY surface, skin, fabric, material, and environmental element must be rendered in the "3D Pixar" idiom, not in any other medium.
Character appearance reference (MUST match exactly):
- Младшая сестра: Strong rule: style --- Cinematic Realistic ---. 8-year-old girl, cute, dark hair, wearing a simple cozy sweater, innocent and focused expression
