Character consistency

How to keep a character consistent across every shot

Character consistency means a viewer never doubts they are watching the same person. In generated video it slips quietly: a collar changes color, a face softens, a cup moves hands. This page covers where it breaks, what to do about it, and how to measure it on your own clip.

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Where consistency breaks

Identity drift
The face softens, the jawline moves, the hair changes length. Each shot looks fine alone and the person is no longer the same across the clip.
Wardrobe swaps
A collar changes color, a jacket loses its zip, a watch moves wrists. Small garment details are the first thing to slip.
Held objects
A cup appears in the wrong hand, a bag vanishes between shots, a phone becomes a different phone.
Screen direction
Someone walks left to right, then right to left with no cut to justify it, so the geography of the scene stops making sense.

Four habits that hold a character

  1. 01

    Write one character sheet and reuse the exact wording in every prompt.

  2. 02

    Keep the first good frame as your anchor and compare new shots to it, never to the previous shot.

  3. 03

    Name the clothing item by item with colors, and list anything the character holds.

  4. 04

    Regenerate the failing shot rather than the whole sequence once you know which shot broke.

Common questions

How do you make a consistent AI character?
Lock the description before you generate. Write one short sheet for the character covering face, hair, build, clothing item by item with colors, and anything they carry. Reuse that exact wording in every prompt instead of paraphrasing it, and keep one generated frame as the reference you compare against. Then check the result, because the same prompt still drifts across shots.
How do animators keep characters consistent?
With a character bible: a reference sheet drawn from several angles, a fixed color palette with named values, and a continuity log per scene listing what the character wears and carries. Every shot is checked against the sheet, not against the previous shot, so small errors do not accumulate.
Can AI video models maintain character consistency across shots?
Partly. Within a single short generation the same face usually holds. Across separate generations, and across cuts inside longer clips, identity, clothing and held objects drift often enough that the output needs checking before it ships.
How do you check consistency without watching frame by frame?
Compare each later appearance against the first clear appearance instead of against the neighbouring frame. That is what this tool does: it fixes an anchor per person, per set and per prop, then reports every later moment that contradicts the anchor, with a timecode and the two frames side by side.

Measure it instead of guessing

Upload the clip and you get a score, a timeline marked at every break, and the two frames that disagree so you can see the call for yourself. The same measurement runs on every clip, which is what makes two versions of a shot comparable. Scored runs that people publish sit on the live benchmark, and the analysis page explains what the model reads.