Replace a Character in a Film Scene

Four ways to replace a character

Put your own character into a film frame and you still have to decide how much of the actor to take out. The frame below is Jack Sparrow at the wheel: a hat, a bandana, dreadlocks with beads, a braided beard, kohl around the eyes, a pirate’s coat. Our character is Mara Vale from AI Character Sheet — one image with her face close-up and full body. The four modes differ only in the sentence that says what goes and what stays.

Blind prompts. Each mode below gives the method as a blind template — picture roles only, nothing about how your character or the frame looks; {character} is your character’s name. The prompts we tested on Mara and Jack, kept under “Example run”, still named her clothes and the frame’s details; the blind form is the rule now and keeps their structure. One exception: the expression of picture 2 — where the eyes look, the brows, the mouth — is named in words (checked below).

Mara plays the scene as herself: her face, her ponytail, her own clothes. Say that her face, hair and clothes come from picture 1 and that nothing of the clothes, headwear or gear of the person in picture 2 stays — by role, never by naming the pieces. The result has none of Jack’s gear, and the wheel, the sky and the stare are the film’s.

Here the costume is the point: Mara as a pirate. Ask for her head — face and hair, bare-headed — and say that everything from the neck down stays. Say what leaves with his head, too: face, hair, facial hair, make-up and whatever he wears on it. Two runs, both clean.

The film’s silhouette stays — hat, bandana, dreadlocks — and only the face is hers. The words that make it clean: “clean and bare exactly as in picture 1, with no facial hair and no make-up” — the beard and the kohl stayed on Jack’s side. Nano Banana 2 Lite managed this mode too, with the same prompt.

The hardest mode: her features, but the actor’s surface — paint, make-up, facial hair, dirt — stays exactly where it was. The sentence that does it: “Everything on the surface of the face stays exactly as in picture 2”, followed by the kinds of surface that stay — paint, make-up, facial hair, dirt — named by role, never by colour or shape. We show it on William Wallace in Braveheart: the blue woad covers half of the face, so any drift is visible at once. The same frame in mode 3 for comparison: the prompts differ only in what they say about the face.

Look at the eyes in modes 1–3: Mara frowns straight into the lens in every frame. Jack does not — he looks just past the camera, brows up, mouth open mid-word. The stare comes from picture 1: on the character sheet she looks into the camera, and “the same gaze and expression” in the prompt is not enough to override it. One more sentence fixes it: take the look and the expression from picture 2, never from picture 1 — the eyes look where the eyes of picture 2 look.

Blind check · 9 October 2026

The blind templates above, word for word, on the same sheet and frames — GPT Image 2.5 Flare, quality low.

Mode 4 on Jack Sparrow never came through. GPT Image 2.5 refused every attempt with content_policy_violation — six different wordings, one step and two steps, on Sunburst and on Flare. The trigger is the look itself: the braided beard with beads and the kohl around the eyes are Jack Sparrow. The same mode on Braveheart, with the paint named instead of the beard and kohl, went through both times — and mode 3 on it too.

• Moderation refusals came back in 3–26 seconds in these experiments. Modes 1 and 3 on Jack were refused most of the time too and went through on a later try; mode 2 went through both times.
• Removing the look is easier to get through than keeping it: modes 1–3 take Jack away; mode 4 asks to keep exactly what makes him Jack.
• Other models do not refuse — they fail. On the same frame:

The recipe

1. Make a character sheet — face close-up and full body in one image (how). It is picture 1.
2. Take the frame at full size as picture 2.
3. Start the prompt the same way every time: “Picture 2 is a frame from a film. Shoot it again exactly the same — the same camera, framing, set, light, pose, head turn, gaze and expression — but…”
4. Then one sentence for the mode: what of the actor goes, and what of the frame stays — by role (the clothes, what is worn on the head, facial hair, paint), never by what they look like.
5. Take the look from the frame: say that the eyes look where the eyes of picture 2 look and that the look and expression come from picture 2, never from picture 1 — or your character stares into the lens like on her sheet.
6. End with “Change nothing else.”
7. Refused? Reword using permitted references. A famous look kept in mode 4 may never go through; pick another frame.
8. Animate it as a start frame — see Animate an AI Character.