AI video creators find drawn expressions work better than prompts for small screens

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A developer creating a vertical video with AI-generated caricatures found that subtle facial expressions specified by text prompts were unreadable on small smartphone screens. The character's face was only a few dozen pixels tall, causing the 'confused' expression to be lost in the lip-sync animation. To solve this, the team replaced the base character image with a new illustration, made via an img2img process, that clearly showed a worried face with lowered brows and a downturned mouth. Using this method preserved the character's identity while making the emotion visible, whereas generating a completely new 'worried' face from scratch created what looked like a different person.

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