How to use Genjutsu AI: a step-by-step guide

Genjutsu AI is video-to-video editing: you keep the footage you already have and change one thing about it — the outfit, the character, the place or the whole art style — while the camera move and timing stay. Here is how to do it in the editor on our homepage, from the first click to a saved video.

Short version: pick a task, upload a 4–30 second clip, add a photo of what goes in, write one sentence that says what changes and what stays, check the credit cost on the button, and press Generate.

1. Pick what you want to change

The editor starts with four tasks. Each one sets the right effect for you:

No clip yet? Tap one of the scene cards under the editor. It loads a finished example — clip, reference and prompt — so you can render it as is or swap in your own photo with one button.

2. Upload your clip

• Length: 4 to 30 seconds (Standard mode: up to 15 seconds). You pay per second, rounded up, so trim to the part you need.
• Size: at least 854×480 (or 640×640 for square clips). Standard Swap and Motion transfer need 720p or larger.
• Format: MP4 works as it is. MOV (including iPhone videos) and WebM can be converted to MP4 right in the editor, and Trim or compress cuts longer clips. Both run in your browser; nothing is uploaded until you press Generate.

Clips work best when the subject you want to change is clearly visible for most of the shot, the camera is fairly steady and there is one main subject. You don't need a green screen.

3. Add a reference image

The reference image is the photo of what goes in: the new character, jacket, watch or place. Pro takes up to 8 for Swap and Motion transfer; Standard takes up to 4.

What makes a good reference:

• One subject, plain background. A product shot or a full-body character on a clean backdrop works better than a busy photo.
• Clearly different from the original. A red smartwatch becoming a gold diamond watch reads instantly; a slightly different watch looks like nothing happened.
• Only things you have the rights to. No photos of real people without their consent — see what isn't allowed.

4. Describe the change in one sentence

Write what changes, then what stays. For example:

Replace the man's denim shirt with the jacket from the reference image. Keep his face, the street and the camera movement.

Say what should stay — especially the camera movement and timing — because the model is free to change anything you don't mention. One change per render works better than three.

Not sure what to write? Type a rough idea and press Improve prompt. It rewrites your words into a clear "change this, keep that" instruction (and translates them into English if needed). It's free for signed-in users, up to 20 times a day, and Undo brings your own version back. More examples are on the prompts page.

5. Choose Standard or Pro

• Standard runs Kling O3 (Swap and Motion transfer) or FLUX.3 Edit (Restyle, with 8 built-in styles). It costs less and is good for drafts and simple swaps.
• Pro runs the Higgsfield Genjutsu model through its official API, at 480p (faster, cheaper) or 720p (sharper). Pro is the option when you want this specific model; it isn't guaranteed to look better on every clip.

The Generate button shows the exact credits before you render. A 5-second clip costs 125 credits in Standard Swap and 250 in Pro at 480p; the price-per-clip guide has the full table.

6. Generate, then save your video

Press Generate. The first time, you confirm once that you have the rights to your footage. A render usually takes a few minutes, longer for long clips and 720p. You can leave the page; the result is saved to My videos in your account.

• Private by default. Your renders are never posted to a public gallery or page.
• Failed renders are refunded. If a render fails or is blocked by the model's moderation, its credits come back automatically. A finished render is charged even if you don't like it, so start with a short draft.
• Download what you want to keep. Videos stay in My videos for at least 90 days.

Credits: how to start

There are no free renders, because every render runs on a paid video model. The cheapest start is the $4.99 trial pack: 300 credits, enough for one 5-second Pro render at 480p or two 5-second Standard Swaps. It's a one-time payment, nothing renews. For regular use, the monthly plans give the lowest price per credit.

Quick fixes when a result looks off

• Face or background changed? Name it in the "keep" part of your sentence, and try a steadier clip with one clear subject.
• The new item barely shows? Use a reference that's clearly different from the original, on a plain background.
• Movement drifts? Add "keep the original camera movement, framing and timing" to the prompt.
• Still not right? Try the same setup in the other mode. Standard is cheaper for testing ideas; Pro runs the Genjutsu model.

Ready? Open the editor and start with a scene card, or see the examples for prompts and settings you can recreate in one click.