Nano Banana AI: Essential Face Editing Techniques

The source provides an extensive overview of Google's Nano Banana AI, presenting it as a revolutionary tool for photo editing that drastically simplifies processes traditionally requiring hours in software like Photoshop. 

The text details various capabilities of the AI, including advanced facial retouching such as smoothing skin, removing blemishes, and fixing uneven skin tone with simple text prompts. Furthermore, the video transcript demonstrates how the AI can perform dramatic transformations like changing skin tone and eye color (using the specific keyword "iris"), whitening and straightening teeth, and achieving both age progression and age reduction effects on subjects like Morgan Freeman and Barack Obama. The content is presented as the first part of a masterclass, with a strong emphasis on the speed, simplicity, and natural realism the AI can achieve, while also including a disclaimer about using the tool responsibly and avoiding harmful stereotypes.

The sources provide several specific prompts demonstrated during the Nano Banana AI masterclass to achieve various face editing results, ranging from skin refinement to drastic age and color transformations.

Below is a categorized list of the specific prompts used in the demonstrations:

I. Skin Smoothing and Correction Prompts

These prompts are designed to refine texture, remove flaws, and adjust lighting for a professionally retouched look:

Purpose	Prompt	Context/Result
Basic Smoothing and Blemish Removal	Smooth skin soften wrinkles remove blemishes even skin tone soft lighting	Used on Morgan Freeman to make porous skin smooth, soften fine lines, remove blemishes, and balance skin tone.
Flawless Airbrushed Finish	Clear skin blemishfree complexion even skin tone reduced redness smooth texture refined pores airbrushed flawless finish	Used on a young woman to minimize pores, make blemishes vanish, fade redness, and achieve a flawless airbrushed quality.

II. Skin Tone Transformation Prompts

These prompts demonstrate changing skin tone, from slight lightening to dramatic color shifts:

Purpose	Prompt	Context/Result
Drastic Color Change (Retaining Texture)	Change his skin tone to a deep demon red retaining the visible pores and skin texture	Used on Peter Dinklage to shift the skin tone to a bold "deep demon red" while ensuring pores and fine texture remained intact.
Moderate Lightening	Lighten the skin tone to a moderately fair complexion maintaining realistic texture and consistent lighting	Used on Morgan Freeman to achieve a moderately lighter skin tone that still looked natural.
Fairer Lightening	fair complexion	Used to achieve a lighter complexion than the "moderately fair" version.
Extreme Lightening (Not Recommended)	very fair complexion	Used to demonstrate that extreme lightning can strip away warmth and depth, causing the result to look washed out and unnatural.

III. Eye Color Change Prompts

When changing eye color, the sources emphasize using the specific keyword iris instead of eyes to ensure accurate results.

Purpose	Prompt	Context/Result
Deep Color Change	Change his iris color to a deep sapphire blue maintaining a natural reflection and detail within the eye	Used on Shah Ruk Khan to transform his brown eyes into deep sapphire blue while preserving subtle reflections and micro details.
Vibrant Color Change	change her iris color to a vibrant sky blue	Used on a woman to transform brown eyes into a vibrant sky blue, maintaining reflections, shine, and intricate iris patterns.

IV. Teeth Correction Prompts

These prompts focus on whitening and alignment. It is important to note that whitening is recommended between 35% and 45% for a natural look.

Purpose	Prompt	Context/Result
Standard Whitening and Straightening (Recommended)	Whiten teeth 35% straighten teeth even edges Match picture lighting Reduce gum redness	This prompt delivers teeth whitened to a healthier shade, straightened with even edges, and reduced gum redness, with AI adjusting lighting for realism.
Extreme Whitening (Not Recommended)	(The prompt used was implied to change the whitening value to) 100%	Using 100% whitening created a result that looked blindingly white, polished, and unnatural, breaking realism.

V. Age Progression and Reduction Prompts

Nano Banana AI can quickly age or de-age a subject, though complex aging often requires a step-by-step approach.

Purpose	Prompt	Context/Result
Simple Age Progression	Make him a lot older like he is in his 70s	Used on YouTuber Carrie Manady to reimagine him in his 70s, adding gray/white hair, wrinkles, and weathered skin texture. (This exact prompt yielded minimal results when used on Taylor Swift).
Simple Age Reduction	make him look a lot younger like he is in his 30s	Used on Barack Obama and Morgan Freeman to reduce their age, resulting in smoother, firmer skin and darker hair, making them look like they were in their 30s.
Detailed Age Progression (Step 1: Hair Thinning)	Make her scalp hair thins faster in women Parting line becomes wider Overall volume decreases	Used on Taylor Swift as the first step in a multi-step process to create a more authentic, aged look.
Detailed Age Progression (Step 2: Hair Color Change)	Hair color turns gray/white Sometimes uneven patches at first	Used as the second step to add gray hair with an aged appearance.
Detailed Age Progression (Step 3: Refinement)	make her eyebrows and eyelashes become thinner sparse lighter in color	Used as the final step to refine the aging effect, creating a portrait that looks genuinely older.

1. How to smooth skin with Nano Banana AI
2. Change skin tone with Nano Banana AI
3. Change eye color with Nano Banana AI
4. Teeth whitening & straightening using Nano Banana AI
5. Age Progression with Nano Banana AI

How to smooth skin with Nano Banana AI?

Smoothing skin using Nano Banana AI is a core feature of the tool, allowing you to achieve results in seconds that would typically take hours of expert retouching in traditional programs like Photoshop.

Here is a comprehensive guide based on the methods demonstrated in the sources:

The General Process

1. Access Nano Banana AI: You need to go to gemini.google.com.
2. Select the Model: Select the Nano Banana AI model.
3. Upload the Image: Upload the photo you wish to edit.
4. Enter the Prompt: Type in a specific prompt detailing the desired results.

Achieving Smooth Skin Texture

Nano Banana AI can instantly transform porous skin into a silky smooth texture using simple prompts. It can also fix issues like visible sweat and oily shine, replacing them with a clean, natural look.

You can use different prompt variations depending on the level of refinement required:

1. Basic Smoothing and Refining Prompt (Example used on Morgan Freeman):

To fix blemishes, soften wrinkles, and improve overall texture, the following prompt was used:

• Prompt: "Smooth skin soften wrinkles remove blemishes even skin tone soft lighting".
• Results Achieved: The porous skin texture became smooth, fine lines and wrinkles were softened, blemishes completely disappeared, and the skin tone was balanced.

2. Flawless, Airbrushed Finish Prompt (Example used on a Young Woman):

To achieve a highly refined look, minimize pores, and address specific issues like redness, this detailed prompt was used:

• Prompt: "Clear skin blemishfree complexion even skin tone reduced redness smooth texture refined pores airbrushed flawless finish".
• Results Achieved: The transformation included minimizing pores, causing blemishes to vanish, fading redness, and resulting in an overall flawless airbrushed quality.

Additional Skin Corrections Possible

Beyond general smoothing, Nano Banana AI can fix various other skin issues effortlessly:

• Pimples and Breakouts: These can be removed in seconds.
• Blemishes and Dark Spots: These can be fixed, as shown in the example on Morgan Freeman.
• Redness: Redness around the cheeks or other areas can be].
• Results Achieved: The transformation included minimizing pores, causing blemishes to vanish, fading redness, and resulting in an overall flawless airbrushed quality.

Additional Skin Corrections Possible

Beyond general smoothing, Nano Banana AI can fix various other skin issues effortlessly:

• Pimples and Breakouts: These can be removed in seconds.
• Blemishes and Dark Spots: These can be fixed, as shown in the example on Morgan Freeman.
• Redness: Redness around the cheeks or other areas can be reduced.
• Uneven Skin Tone: The AI can balance and even out the skin tone.

The power of Nano Banana AI lies in its ability to handle these complicated corrections in just one or two prompts within seconds.

Change skin tone with Nano Banana AI

Changing skin tone with Nano Banana AI is a powerful feature that allows for quick and dramatic transformations, shifting tones from neutral to warm, dark to light, or light to dark, using simple, well-crafted prompts.

Here is a guide on how to change skin tone using Nano Banana AI, drawing on the examples demonstrated in the sources:

The General Process

1. Access Nano Banana AI: Go to gemini.google.com.
2. Select the Model: Select the Nano Banana AI model.
3. Upload the Image: Upload the photo you wish to edit.
4. Enter the Prompt: Use specific phrasing to dictate the desired skin tone change.

Methods and Prompts for Skin Tone Transformation

Nano Banana AI can handle transformations ranging from subtle lightening to drastic color changes, while maintaining realism and texture.

1. Achieving Drastic Color Changes

You can change a subject's skin tone to an unnatural or dramatic color, while ensuring the natural skin texture is preserved:

• Prompt Example: "Change his skin tone to a deep demon red retaining the visible pores and skin texture".
• Result: When applied to Peter Dinklage, the skin tone shifted to a bold, striking "deep demon red". Importantly, the pores, fine texture, and realistic details of his skin remained intact, preventing the image from looking like a flat paint job and keeping it believable.

2. Lightening the Skin Tone (Dark to Light)

The sources demonstrate lightening Morgan Freeman's naturally deeper skin tone through varying degrees of adjustment:

• Moderately Fair Complexion (Recommended for Realism):

  • Prompt Example: "Lighten the skin tone to a moderately fair complexion maintaining realistic texture and consistent lighting".
  • Result: The skin tone became moderately lighter yet still looked natural. The realistic texture was preserved, and the lighting remained consistent, maintaining the feel of a genuine photograph.

• Fair Complexion (More Significant Lightening):

  • Prompt Example: "fair complexion".
  • Result: This prompt yielded a lighter result compared to the "moderately fair" version, demonstrating the effect of further adjustment.

• Extreme Lightening (Not Recommended):

  • Prompt Example: "very fair complexion".
  • Result: This extreme lightning looked fake and uncomfortable. It stripped away the warmth, depth, and natural richness of the original skin tone, resulting in a washed-out and unnatural appearance that lost the authenticity of the portrait.

Key Considerations for Realistic Transformation

When using Nano Banana AI to change skin tone, it is crucial to use the tool responsibly.

• Maintain Texture and Realism: The AI excels at preserving realistic texture and consistent lighting even during dramatic shifts.
• Avoid Extremes: The sources caution that not every transformation is meant to look natural; restraint is key to achieving realism. For example, extreme lightning can break realism and make the result look washed out.
• Ethical Use: You are strongly requested not to use prompts that reinforce harmful or negative stereotypes about race, ethnicity, or culture, including exaggerating features associated with stereotypes. The tool should always be used responsibly.

Change eye color with Nano Banana AI

Changing eye color using Nano Banana AI is a straightforward and highly effective feature that allows you to transform eye color while maintaining natural detail and realism.

Here is a step-by-step guide on how to change eye color with Nano Banana AI, based on the information provided in the sources:

The General Process

1. Access Nano Banana AI: Go to gemini.google.com.
2. Select the Model: Select the Nano Banana AI model.
3. Upload the Image: Upload the photo you wish to edit.
4. Enter the Prompt: Type in a specific prompt to dictate the desired eye color change.

Essential Prompting Detail: Use "Iris," Not "Eye Color"

To ensure the results are accurate and successful, you must use the keyword 'iris' instead of 'eyes' in your prompt.

• Why this matters: The iris is the specific colored part of the eye. If you simply write "change eye color," the results might not look accurate, whereas using "iris" makes a huge difference in the outcome.

Examples of Successful Eye Color Change Prompts

The sources provide clear examples of how to achieve both deep and vibrant eye color changes:

1. Achieving a Deep Sapphire Blue:

To transform brown eyes into a deep, intense blue while preserving intricate details, the following prompt was used on Shah Ruk Khan:

• Prompt: "Change his iris color to a deep sapphire blue maintaining a natural reflection and detail within the eye".
• Result: The subject acquired sapphire blue irises. The edit looked natural because the subtle reflections and micro details in the eye were preserved, preventing the result from feeling artificial.

2. Achieving a Vibrant Sky Blue:

To change brown eyes to a bright, vibrant color, the following prompt was used on a woman's portrait:

• Prompt: "change her iris color to a vibrant sky blue".
• Result: Her once brown eyes became bright sky blue, radiating a completely different aura. The transformation was highly detailed, with the reflections, shine, and intricate iris patterns all remaining intact, making the edit look stunningly realistic.

Summary of the Feature

Nano Banana AI's ability to change eye color is described as a fascinating feature. With just a few words in a prompt, the tool can reshape the emotional impact of an entire portrait simply by altering the color of the eyes. You can transform brown eyes into piercing blue, green into hazel, or even create unique colors.

How to Teeth whitening & straightening using Nano Banana AI?

Teeth whitening and straightening are easily achieved using Nano Banana AI with a specific, detailed prompt. This feature allows for a complete smile transformation in seconds, a process that typically requires significant skill and time in traditional editing software.

Here is how to whiten and straighten teeth using Nano Banana AI, based on the demonstrations in the sources:

The General Process

1. Access Nano Banana AI: Go to gemini.google.com.
2. Select the Model: Select the Nano Banana AI model.
3. Upload the Image: Upload the photo containing the subject whose teeth you wish to edit.
4. Enter the Prompt: Use the recommended prompt structure that includes specific percentage values for whitening.

The Recommended Prompt for Whitening and Straightening

The sources provide a comprehensive prompt designed to achieve a healthy, balanced, and natural-looking smile:

• Prompt: "Whiten teeth 35% straighten teeth even edges Match picture lighting Reduce gum redness".

Results Achieved with the Recommended Prompt

Using this prompt delivers several transformations simultaneously:

• Teeth Whitening: The teeth are whitened to a healthier shade.
• Straightening and Alignment: The teeth are straightened with even edges.
• Realism Maintenance: The AI automatically adjusts the lighting so the newly whitened teeth match the rest of the photo, which maintains realism instead of looking "pasted on".
• Gum Health: Gum redness is noticeably reduced.

The result is a smile that looks cleaner, brighter, well-balanced, and naturally impactful.

Crucial Advice on Whitening Percentage

A key insight from the sources is the importance of controlling the degree of whitening to maintain realism:

• Recommended Range: You should always use whitening between 35% and 45%. When the whitening is set around this range (e.g., 35% to 40%), you strike the perfect balance: stains are gone, the teeth look brighter, and the smile feels fresh, healthy, and natural.

• Why to Avoid Extremes: Going beyond the 45% range can start to make the result look fake. When the whitening value was changed to 100% in a test:

• The teeth became blindingly white, perfectly straight, glowing, and polished.
• The result felt unnatural and "almost too perfect".
• The glow distracted from the rest of the face and broke realism.
• This "overdone" effect gives an artificial, almost plastic look, proving that the magic of Nano Banana AI lies in enhancing just enough to make edits believable, rather than going to an extreme.

Age Progression with Nano Banana AI

Changing the age of a subject, whether through age progression (making them older) or age reduction (making them younger), is a core, "mind-blowing" feature of Nano Banana AI. What would typically require hours of professional Photoshop retouching can be achieved in seconds with a single prompt.

The overall process involves going to gemini.google.com, selecting the Nano Banana AI model, uploading the image, and entering the appropriate prompt.

Here is a comprehensive guide on how to perform age progression and age reduction using Nano Banana AI, categorized by the level of detail required:

I. Simple Age Progression (Making Someone Older)

For quick, simple results, you can use a single-line prompt:

• Prompt Example: "Make him a lot older like he is in his 70s".
• Demonstrated Result (on YouTuber Carrie Manady): When applied to the 26-year-old subject, the AI reimagined him as a man in his 70s. The resulting transformation included:
  • Hair that became thinner and almost completely white.
  • A beard that turned white, becoming fuller and framing his face with the dignity of age.
  • Wrinkles appearing naturally across his forehead and around his eyes.
  • Skin showing the weathered texture of time.
  • The original glasses remained, anchoring him to the image.

II. Detailed Age Progression (Multi-Step Refinement)

Sometimes, a single-line prompt may not produce a convincing or detailed result, as demonstrated in an example with Taylor Swift where the result was "minimal". For more detailed, cinematic, and realistic age progression, it is recommended to break the process into sequential steps using cumulative prompts:

Step	Purpose	Prompt	Resulting Effect
Step 1: Hair Thinning	To simulate hair loss and change volume typical in aging women.	Make her scalp hair thins faster in women Parting line becomes wider Overall volume decreases	The edit showed reduced volume, making the look closer to an aged appearance.
Step 2: Hair Color Change	To add realistic graying.	Hair color turns gray/white Sometimes uneven patches at first	The effect became stronger, and her hair turned gray with a more aged appearance.
Step 3: Refinement	To refine the texture and smaller details of the face.	make her eyebrows and eyelashes become thinner sparse lighter in color	This final version created the authentic aging effect, layering the progression of time naturally to create a portrait that looks genuinely older.

III. Age Reduction (Making Someone Younger)

To reverse time and make an older person look decades younger, a simple prompt is typically sufficient:

• Prompt Example: "make him look a lot younger like he is in his 30s".
• Demonstrated Result (on Barack Obama): The younger Obama appeared with several changes:
  • Hair that was completely dark again, free of gray.
  • Skin that was smoother and firmer, with fine wrinkles around the eyes and forehead reduced.
  • A more youthful appearance with sharper contours.
• Demonstrated Result (on Morgan Freeman): When reversed to his 30s, the transformation was described as "jaw-dropping":
  • The gray hair and beard vanished, replaced with a full head of dark hair and a neatly trimmed mustache.
  • Deep wrinkles and age spots disappeared, replaced with smooth, glowing skin.
  • The overall energy looked younger and vibrant.

Summary

For simple age progression or age reduction, one prompt is enough. However, for detailed and realistic aging effects, using step-by-step refinement and cumulative prompts works best.