✍️ Prompts · Negative Prompts

Negative Prompts for AI Video: What They Do and What to Put In

📅 Oct 2026·⏱ 4 min read·PulseMotionHub Team

A negative prompt tells the model what you do not want. Used well, it removes the most common problems: extra fingers, warped faces, watermarks and style drift. Used badly, it clutters the instruction and makes the result worse. This guide explains what it does, where to find it, and which entries are worth using.

Key takeaways

A negative prompt lists things to avoid. It is optional in both Image to Video and Text to Video.
Keep it short and specific: five to ten items beat a long list.
Use different lists for people, products and style control.
It reduces common errors, but it does not guarantee a result.

What a Negative Prompt Is

A normal prompt says what you want. A negative prompt says what the model should steer away from. If your portraits keep gaining extra fingers, or your illustrations keep turning photorealistic, adding those terms to the negative prompt can reduce the problem. How strongly a given model responds varies, which is why testing matters.

Where to Find It

In the Image to Video tab and the Text to Video tab, look for the Negative Prompt section marked Optional. Expand it, type your list separated by commas, and generate as usual. It costs nothing extra.

Starter Lists You Can Copy

Use	Negative prompt
People and portraits	extra fingers, deformed hands, distorted face, melting features, extra limbs
Keeping the same person	different person, changed face, altered features
Products	changed logo, altered label, different shape, warped, text, watermark
Keeping an art style	photorealistic, 3D render, different art style
Clean image quality	blur, low quality, artifacts, noise, flicker
No overlays	text, subtitles, watermark, logo

Test it on your own clip.
Generate once with and once without for 2 credits.

How to Write One

Name the specific problem. If hands keep looking wrong, write “deformed hands”, not “bad”.

Use plain nouns and adjectives, separated by commas. No sentences.

Keep it to a handful of items. Five to ten is plenty.

Do not repeat the prompt in reverse. Do not write “no camera movement” in the negative box and “orbiting camera” in the main one.

Test and compare. Run the same prompt with and without, and keep what helps.

Why Long Lists Backfire

Large lists of dozens of terms can crowd the instruction, and some terms may conflict with what you do want. For instance, putting “blur” in a negative prompt for a clip that should have a shallow depth of field can fight the look you described. Add terms only when you have seen the problem.

What Negative Prompts Cannot Do

They do not fix a bad photo. A soft or damaged source stays soft.
They are not a guarantee. Hands may still go wrong in some clips.
They do not unlock blocked content. Prompts that break the content policy are stopped before generating and count as a strike.
They do not replace a good main prompt. Describe the camera and motion first.

Examples in Context

Prompt: The woman blinks and smiles slightly. Slow push-in. Soft window light. | Negative: extra fingers, distorted face, different person, blur. Prompt: An anime-style girl on a rooftop, hair blowing in the wind, city lights twinkling. Static camera. | Negative: photorealistic, 3D render, different art style. Prompt: A white sneaker on a pastel background, slow push-in, soft studio light. | Negative: changed logo, altered shape, text, watermark, warped.

Related Techniques

Negative prompts work best alongside a clear main prompt. See the portrait prompt library, the product prompts and our prompting guide. If your clips keep going wrong in the same way, our nine fixes for dance videos apply the same step-by-step thinking.

Frequently Asked Questions

What is a negative prompt in AI video?

A list of things you want the model to avoid, such as extra fingers, distorted faces or watermarks. It is an optional field in the Image to Video and Text to Video tools.

Does a negative prompt cost extra credits?

No. It is part of the same generation and does not change the price.

How long should a negative prompt be?

Short. Five to ten specific terms is usually enough. Long lists can crowd the instruction and conflict with what you want.

Will a negative prompt fix distorted hands?

It can reduce the problem, but it is not a guarantee. Choose photos where hands are not the focus and test with and without.

Can I use a negative prompt to get around the content policy?

No. Prompts that break the content policy are stopped before generating, and repeated violations lead to suspension.

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