Why your AI influencer's face keeps changing

One: you reworded the description

This is the biggest single cause and the hardest to notice, because the sentence still means the same thing to you. "Long dark wavy hair" and "dark wavy hair past the shoulders" are the same fact to a human reader and two different token sequences to a model, and token order changes the weighting of everything after it.

The fix is mechanical rather than clever: write the descriptor once, treat it as a string, and paste it. That is the entire reason the locked line in a character sheet is rendered as code and never as prose — prose invites editing, and editing is the failure.

Two: the seed is floating

Without a pinned seed, re-running the same prompt is a fresh roll. You cannot debug a face you cannot reproduce, and most of the time people spend "fixing the prompt" is actually spent comparing two unrelated rolls.

Pin it. Write down which seed produced the frame you kept. Change it deliberately when you want a genuinely different result, and never change it while you are trying to work out what went wrong.

Three: you changed two things at once

New outfit and new location in the same generation. The face moves, and you now have no idea which change moved it — so the next attempt changes three things, and by the fourth you are prompting at random.

One variable per generation is a discipline borrowed from every other experimental practice, and it is unreasonably effective here. It also makes the shot library useful rather than decorative: a shot recipe holds the framing constant so the only thing that varies is the one thing you meant to vary.

Four: there is nothing to anchor on

A face built entirely from flattering adjectives — symmetrical, striking, beautiful — has no landmark, and a model asked for a beautiful face produces the average of every beautiful face it has seen. The average is different every time because the sampling is.

One concrete asymmetric feature does more work than a paragraph of aesthetics. A gap between the front teeth. A small vertical scar through the left eyebrow. A single grey streak at the front. These survive re-rolls because they are unusual enough that the model has to actively place them rather than regress toward the mean.

This is why the studio treats the distinguishing mark as a required field and warns you when you pick "none". Choosing none is legitimate — it just means you have moved yourself onto a more expensive production route without noticing.

When the fix is not a prompt

Above a certain level of ambition, no amount of prompt discipline is enough. Three-quarter angles, profiles, motion and unusual light all break a text-only description, because a sentence about a nose says almost nothing about its silhouette.

That is what the production routes are for. If you are posting stills at a fixed distance, the prompt-only route genuinely works. If you are posting video, it does not, and knowing that before you build a workflow on it is worth more than any prompt trick.