Creating Consistent Characters with Gemini AI: Customizing Body Types

📌 Sample Prompts from this video:

Create an image of a tall young man standing on an absolute pure white background. He has short, slightly wavy dark blonde hair styled neatly to the side. His skin is fair, and he has a slim, athletic, and fit body. His expression is neutral with a subtle, soft smile, and he is facing directly forward with both arms relaxed at his sides. He is wearing a fitted navy red swim brief with a sporty cut. His feet are bare, and his posture is straight and confident, giving a natural and strong appearance. High-resolution, full-body shot, professional studio lighting.

Create an image of the man, changing only his body to extremely Obese keeping his outfit and pose unchanged.

Create an image of the man, changing only his body to extremely Athletic build keeping his outfit and pose unchanged.

Average Male Physique

Create an image of a tall young man standing on an absolute pure white background.
He has short, slightly wavy dark blonde hair styled neatly to the side. His skin is fair, and he has an average, everyday body type — not overly muscular or overweight, just a natural and ordinary build.
His expression is neutral with a subtle, soft smile, and he is facing directly forward with both arms relaxed at his sides.
He is wearing a fitted navy red swim brief with a sporty cut.
His feet are bare, and his posture is straight and confident, giving a natural and approachable appearance.
High-resolution, full-body shot, professional studio lighting.


Sculpted Athletic Body

Create an image of a tall young man standing on an absolute pure white background.
He has short, slightly wavy dark blonde hair styled neatly to the side. His skin is fair, and he has a slim, athletic, and fit body with an exaggeratedly muscular chest and very well-defined, highly muscular abs.
His expression is neutral with a subtle, soft smile, and he is facing directly forward with both arms relaxed at his sides.
He is wearing a fitted navy red swim brief with a sporty cut.
His feet are bare, and his posture is straight and confident, giving a natural and strong appearance.
High-resolution, full-body shot, professional studio lighting.


Heavyset Body Type

Create an image of a tall young man standing on an absolute pure white background.
He has short, slightly wavy dark blonde hair styled neatly to the side. His skin is fair, and he has a very overweight body with a large, heavy build, round stomach, and soft features.
His expression is neutral with a subtle, soft smile, and he is facing directly forward with both arms relaxed at his sides.
He is wearing a fitted navy red swim brief with a sporty cut.
His feet are bare, and his posture is straight, giving a natural and confident appearance.
High-resolution, full-body shot, professional studio lighting.


Powerlifter Build

Create αn image of a tall young man standing on an absolute pure white background.
He has short, slightly wavy dark blonde hair styled neatly to the side. His skin is fair, and he has a powerlifter build — very thick and massive body, broad chest, wide shoulders, bulky arms, and heavily muscled legs, combined with a solid midsection that shows both strength and bulk. His frame emphasizes raw power over definition.
His expression is neutral with a subtle, soft smile, and he is facing directly forward with both arms relaxed at his sides.
He is wearing a fitted navy red swim brief with a sporty cut.
His feet are bare, and his posture is straight and confident, giving a natural but very strong and imposing appearance.
High-resolution, full-body shot, professional studio lighting.

In this tutorial, we’ll explore how to design consistent and customizable human characters using Gemini AI. You’ll learn how to:

Use outfits that reveal the body shape for easier edits

Work with a pure white background for clean, professional results

Modify prompts to adjust body types, hair color, and facial details

Upload reference images and transform body types while keeping facial identity intact

Troubleshoot prompts when the AI doesn’t generate results as expected

We’ll create a slim male character, transform him into an overweight version, and then into an extremely athletic version—while keeping all other features consistent.

💡 Pro Tip: Even tiny adjustments in your prompt (like adding a space) can help fix failed generations.

Now it’s your turn! Copy the prompts above, experiment with your own edits, and share your best creations in the comments.

👍 Don’t forget to like, subscribe, and hit the bell for more Gemini AI tutorials.

00:05 Introduction
00:25 Creating a male character with the video description prompt
00:47 Editing the prompt to generate an overweight character
01:09 How the same prompt creates slightly different results
01:29 Downloading the full-size character image
01:38 Adjusting the initial prompt on the generated image
01:58 Using a reference image to refine the character
02:28 Resubmitting when a prompt fails