Art style: Cinematic Realistic.
A conceptual, tense shot of the fire suddenly dwindling down to mere embers, with thick, spiky blue frost instantly creeping across the floor towards the sleeping family. 3D Animated Feature style, visually dramatizing the threat of the cold.
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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 "Cinematic Realistic" style. Match the lighting grammar, material response, colour science, level of realism / stylisation, line weight, and shading model typical of "Cinematic Realistic". 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 "Cinematic Realistic" idiom, not in any other medium.
