Genjutsu prompt generator: build a prompt that lands

How the Genjutsu prompt generator works

The builder above composes a complete recast instruction from three answers: what changes, what to use instead, and what must stay. It runs entirely in your browser - nothing is sent anywhere until you paste the result into the generator and hit run.

The output follows the same formula as every template in the Genjutsu prompt library, because that is the shape the model reads best: one element named, one reference pointed at, one line about what must survive the recast.

The three questions every Genjutsu prompt answers

• What changes - name the element plainly: "both fighters", "the leather jacket", "the wall behind her".
• What to use instead - point at the reference image you attached for that element: "the dancers from my reference images".
• What must stay - name the thing you cannot afford to lose: the choreography, the camera move, the product label.

Motion Transfer or Object Swap: picking the mode

Motion Transfer rebuilds the scene around your footage: the motion, the camera and the timing stay, and the cast, wardrobe, location and props can all change. Use it when the shot itself is right and the world inside it should be different.

Object Swap changes a single element and preserves the rest of the original frame - one outfit, one product, one prop. Use it for point edits, where a full restage would be overkill.

Three worked examples

Prompt mistakes the builder prevents

• Describing the motion or the camera - the clip already defines both, and describing them fights your own footage.
• Naming an element without a reference image - "the pink jacket" is guesswork, "the jacket in image 2" is not.
• Stacking several unrelated changes into one run - split them and recast one element at a time.
• Padding with quality tokens like 8k, masterpiece or cinematic - they do nothing for a video-to-video model.
• Leaving out the thing that must stay - if a label or a punchline has to survive the recast, say so.

From prompt to finished render

• Sign in with Google and open the generator.
• Upload a source clip between 3 and 30 seconds - one clean shot with one clear subject.
• Attach 3 to 6 reference images per element you want to change, up to 40 per project.
• Paste the prompt you built here into the prompt field.
• Check the credit cost the generator shows before you confirm, then run and review the result.

Can you reuse one prompt across a series?

Yes - and it is the fastest way to keep a series consistent. Keep the wording and the reference images identical, change only the source clip, and every run inherits the same cast, wardrobe and grade. When you need variants, change exactly one line and rerun.