Grok Imagine 锁定画面一致性 人物角色提示词

REFERENCE AUTHORITY (NON-NEGOTIABLE): The uploaded image is the locked starting frame and sole authority. This frame must be referenced frame by frame throughout the sequence. The character's identity, scale, proportions, materials, textures, lighting, props, posture, and environment do not change. No reinterpretation. No harmonization. No redesign. No new elements may be introduced at any point.