The Seedance 2.0 API path through SeeAPI rewards clean inputs—multimodal references, character consistency, and a Fast/Quality/Lite flow—yet dirty phone stills and messy backgrounds can burn a 720p-class credit line without fixing the face. Why Dirty Phone Stills Break Character ConsistencyPhone captures arrive with mixed lighting, partial motion blur, and background clutter that competes with the face edge. Seedance 2.0 can hold identity when the reference frame gives it a stable anchor. Producers who skip crop and cleanup pay twice: once in preview time, again when Quality export still shows drift beside the original JPEG. Quality export approved only after face, logo, and crop checks—then hand to editorial with the still attached.