What is a negative prompt?
A negative prompt is a set of words or phrases that tells the image model what to avoid. While the main prompt describes what you want to create, the negative prompt describes things you do not want to appear in the result.
For example, a main prompt might describe a cozy reading room, while a negative prompt might ask the model to avoid blurry details, watermarks, or unwanted text.
Main prompt:
a cozy reading room with a comfortable armchair, warm window light, indoor plants, peaceful atmosphere
Negative prompt:
blurry, watermark, text
Negative prompts can be useful, but they are not magic. They work best when they are short, relevant, and focused on common visual problems.
How Kuvagen handles negative prompts
In Kuvagen, the Negative prompt field is used for extra negative terms that you want to add manually. However, the final negative guidance may include more than what you type.
If the Negative prompt field is empty, that means you did not add a custom negative prompt. It does not always mean that no negative guidance is used at all. Kuvagen may still apply basic quality guidance automatically, and selected styles may add their own negative guidance.
The general idea is:
Final negative guidance =
your extra negative prompt
+ selected style negative guidance
+ basic quality guidance
This is why the placeholder in the Negative prompt field can show text such as:
Auto-added: low quality, worst quality, blurry, watermark, text
The placeholder is only a preview of what is automatically applied. If you type your own negative terms, the placeholder disappears because normal form placeholders are hidden while the field contains text. The automatic guidance is still applied in the background.
Why the placeholder changes by style
Kuvagen style presets can add prompt guidance automatically. This affects both the main Prompt field and the Negative prompt field.
For example, when a style is selected, the Prompt placeholder can show the style direction that will be added automatically. The Negative prompt placeholder can also show the negative guidance associated with that style.
| Default or no style | Basic negative guidance may be shown, such as low quality, worst quality, blurry, watermark, text. |
|---|---|
| Illustration style | The placeholder may include negative terms that reduce photorealistic output, such as photo, photorealistic, and film still. |
| Fashion style | The placeholder may include portrait-specific terms such as overprocessed skin, waxy skin, plastic skin, harsh flash, and amateur. |
This makes the interface more transparent. You can see what the selected style is likely to add, while still keeping the input fields simple.
Basic quality guidance
Kuvagen may apply a small set of basic negative terms to help reduce common problems in generated images. These are general quality terms, not creative instructions.
Basic quality guidance:
low quality, worst quality, blurry, watermark, text
These terms are useful because generated images can sometimes contain unwanted text, blurry details, or artifacts that look like watermarks. Basic quality guidance is intended to reduce those common issues without requiring beginners to write a negative prompt every time.
Style-specific negative guidance
Some styles may apply additional negative guidance. This helps the selected style stay closer to its intended look. For example, an Illustration style may try to avoid photorealistic results, while a Fashion style may try to avoid overprocessed skin or harsh flash.
Illustration style example
Automatically applied Illustration negative guidance:
photo, photorealistic, film still, low quality, worst quality, blurry, watermark, text
This helps the model stay closer to a digital illustration or painterly look instead of moving toward a photo-like result.
Fashion style example
Automatically applied Fashion negative guidance:
overprocessed skin, waxy skin, plastic skin, harsh flash, amateur, low quality, worst quality, blurry, watermark, text
This helps fashion portraits avoid some common issues, such as artificial-looking skin, harsh lighting, low-quality output, or unwanted text.
When should you add your own negative prompt?
You do not need to add a custom negative prompt every time. In many cases, the automatic guidance is enough, especially if your main prompt is clear and the selected style already matches your goal.
Add your own negative prompt when you notice a repeated issue that the automatic guidance does not fully solve.
Portraits sometimes show distorted hands or unusual fingers.
bad hands, malformed hands, deformed fingers, extra fingers, missing fingers, fused fingers
A scene keeps adding unwanted signs or lettering.
text, letters, logo, watermark, signage
Custom negative prompts are best used as targeted corrections. They should not replace a clear main prompt.
Example: reducing hand and finger issues
Hands can be difficult in AI-generated portraits. If hands are visible and often look distorted, you can combine a better pose phrase with a small negative prompt.
Main prompt phrase:
hands partially in coat pockets
Optional user negative prompt:
bad hands, malformed hands, deformed fingers, extra fingers, missing fingers, fused fingers
The positive phrase is important. Asking for “hands partially in coat pockets” gives the model a simpler, more natural pose. The negative prompt then adds a small correction layer.
Do not overuse negative prompts
A very long negative prompt can sometimes make results less natural. It may push the model away from too many things at once, which can reduce creativity or create strange compromises.
bad, ugly, wrong, messy, weird, distorted, unrealistic, low quality, poor, error, broken, strange, deformed, unnatural, imperfect
blurry, watermark, text, deformed fingers
The focused version is usually easier to understand and easier to adjust. Negative prompts should describe specific problems, not every possible thing that could go wrong.
Improve the positive prompt first
Negative prompts are useful, but the main prompt still matters most. If the image is not close to what you want, first improve the positive prompt by making the subject, setting, lighting, and style clearer.
Weak:
a room
Better:
a cozy reading room with a comfortable armchair, wooden bookshelf, warm window light, indoor plants, peaceful atmosphere
A clear positive prompt often reduces the need for many negative terms. The negative prompt should support the image, not carry the whole direction.
How to read article examples
In Kuvagen guide articles, you may see settings written like this:
| User negative prompt | None |
|---|---|
| Basic quality guidance | Automatically applied |
This means the user did not type extra negative terms into the Negative prompt field. It does not mean the image was generated without any negative guidance. Basic or style-specific guidance may still be applied automatically.
A practical rule for beginners
If you are new to negative prompts, start simple.
Beginner rule:
1. Write a clear main prompt.
2. Choose the style that matches your goal.
3. Check the auto-added guidance shown in the placeholder.
4. Add custom negative terms only for specific problems.
For many images, you can leave the Negative prompt field empty and rely on the automatic guidance. If a repeated problem appears, add a few targeted terms.
Useful negative prompt examples
Here are some practical negative prompt patterns. Use only the parts that match the problem you are trying to fix.
General quality
blurry, low quality, watermark, text
Hands and fingers
bad hands, malformed hands, deformed fingers, extra fingers, missing fingers, fused fingers
Photo-like results when using illustration
photo, photorealistic, film still
Fashion portrait issues
overprocessed skin, waxy skin, plastic skin, harsh flash, amateur
Final tips
Negative prompts are most helpful when they are clear and specific. They can reduce common issues such as blur, unwanted text, watermarks, distorted hands, or style mismatches.
In Kuvagen, the Negative prompt field is best understood as an extra correction field. The placeholder shows what may already be added automatically based on the selected style. You can leave the field empty, or add your own terms when you want to correct a specific problem.