Art style: 3D Pixar.
A sturdy, friendly golden retriever mix with floppy ears and a thick coat of honey-colored fur. He wears a weathered leather collar with a shiny gold medallion featuring a prominent 'B' symbol. His dark brown eyes are filled with deep sadness and concern. He has a broad wet nose and a slightly chunky, comforting build. He stands near a massive, rusted iron door, his posture slumped and his tail held low between his legs. The lighting is dim and cool-toned, casting long shadows across his golden coat as he looks back one last time.
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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.
