Say Goodbye to Fake Filters! How to Make Realistic Fat Filters with AI

Have you seen the viral weight gain filter taking over social media lately? The fat filter results look so incredibly realistic! I totally fell for it at first lol.

I came across a social media post from a friend. She shared two photos side by side—one where she looked thin and another where she appeared noticeably heavier—with the caption, “This is actually the real me.” I was so shocked that I immediately sent her a private message asking what had happened. She then told me it was actually created using AI image to image generator and shared her experience of playing around with this special effect.

After that, I was completely hooked. This is just so much fun. I now want to show everyone how I use AI’s image to image generator feature to experiment with the fat filter myself. If you want to prank your friends, feel free to check it out—guaranteed to give them a huge scare. I personally used the website AIAI.com, and if you’re interested, you can try it out just like I did.

Image Source: https://www.aiai.com/

Before discovering AI tools, I had already tried similar fat filters on social media platforms. However, those filters usually just stretched the image, which often resulted in distorted body proportions and warped facial features that looked very unnatural. AI image-to-image generators work quite differently. Instead of directly stretching the image, they reinterpret and regenerate it based on textual instructions, which helps preserve the overall structure of the person while adjusting body shape more naturally. They can also adapt facial features to better match a fuller appearance. In many cases, the generated images maintain a high level of visual quality and can even appear clearer than the original.

At the beginning, I had no idea how to use AI to achieve the results I wanted. I assumed it was enough to simply tell the AI what I wanted. When I first entered prompts like “make me fat,” the results were nothing like what I had imagined. After a lot of trial and error on AIAI.com, I realized that achieving realistic outcomes requires careful preparation and well-crafted prompts. Below, I’ll share some practical tips I picked up after numerous failed attempts with AI image-to-image generators.

Tutorial: How to Achieve Flawless Weight Gain Effects (Including Prompt Pitfall Avoidance Guide)

At first, I had no clue how to use AI to achieve the results I wanted. I thought it was as simple as telling the AI what I wanted. Initially, I entered prompts like “make me fat,” but the generated photos were nothing like what I envisioned. Later, after experimenting on AIAI.com, I discovered that for realistic results, the groundwork laid in the first step and the prompt itself are crucial. Below, I'll share some practical tips I've picked up after numerous failed attempts with AI image-to-image generators!

Step 1: Access the Image to Image feature page

After opening AIAI.com, locate the Image tab in the toolbar at the top of the page to access the image-to-image feature. Upon entering the page, the Images section in the top-left corner is where you upload your original photo. Click “+ Add,” select a clear selfie, and ensure it's in a common format like PNG or JPG. The file size must not exceed 20MB. At the bottom of the page, you can adjust the aspect ratio. Generally, I'd select Match Image to keep the generated result identical to the original image. If you're creating a phone wallpaper or short video cover, you can choose 9:16. For profile pictures, 1:1 is more suitable.

Step 2: Real-Life Pitfalls with Prompts (Critically Important)

If there's one core step in image-to-image generation, it's undoubtedly the prompt field. When I first started using it, I thought it would be super simple. I just threw a few words into the prompt, like “make me fat” or “fat man,” but the images it generated were beyond words. Either my face shape was completely messed up, my features were blurry, or it didn't even look like me at all—more like some randomly generated cartoon character. I was pretty confused at the time. Everyone else’s results looked so realistic, so why did mine turn out so fake at first?

Image Source: https://www.aiai.com/

Later, I realized the problem: AI doesn't guess what you want—it only recognizes details. I started using the Prompt Assistant on the right to gradually add descriptions, testing and adjusting continuously. I've found that the more specific the description, the more complete the character traits remain, and the closer the final result comes to reality. If you want to generate a perfect rendering, try my prompt. Make the person in the image morbidly obese with massive weight gain. The body should appear extremely heavy and bulky, with a dramatically enlarged torso, very thick arms, an enormous belly extending forward and downward, wide waist and hips, and visibly increased body volume everywhere. The face should be extremely round and full, with heavy cheeks, deep multiple chin folds, thick neck, and compressed facial proportions caused by excess fat. Maintain the same pose and background. Photorealistic, realistic proportions. The weight gain must be extreme, obvious, and impossible to miss.

Image Source: https://www.aiai.com/

Step 3: Wait for your desired finished image to appear!

After entering your prompt, click Generate. This time, you'll notice a clear improvement. Thanks to the combination of precise prompts and the AI image-to-image generator’s algorithms, the generated portrait retains your facial features while achieving professional-grade skin texture and lighting. The generated weight gain effect also looks incredibly natural, without any awkward stretching.

If you're really struggling with prompts or find the generation process too cumbersome and want a simpler approach, try Fat filter on AIAI.com!

Image Source: https://www.aiai.com/

Simply click on the same image location, find the photo effect, scroll down to locate the AI Fat Filter, tap into the page, upload your photo, select the output ratio, and you'll effortlessly achieve the desired image effect! You'll notice the cheeks naturally plump up, with the double chin folds and neck transition seamlessly blended—no harsh liquify traces at all. I was absolutely stunned the first time I used it! My original photo showed me looking thin, but after processing, I became plump and adorable. When I shared the picture, so many friends asked, “When did you gain weight? This edit looks way too real!”If you're not satisfied with the first image, try using a different source image or adjusting the aspect ratio before generating again. Each AI-generated version will feature subtle variations in detail, offering fresh surprises each time.

Image Source: https://www.aiai.com/

The reason I recommend AIAI.com

To be honest, I initially looked into several popular AI image generation tools. But I found that some either require specific hardware configurations or demand exceptionally well-crafted prompts. For people who just want to have some fun or quickly try out the Fat Filter, these tools can be a bit daunting to get started with.

Later, I shifted my approach and started looking for tools that were hassle-free and ready to use right out of the box. That's how I ended up choosing AIAI.com. Once I actually started using it, I realized it's perfect for someone like me who just wants to play around with effects effortlessly. The entire process is completed on the web page, requiring no software downloads and eliminating the need to repeatedly figure out how to craft prompts. The operation is highly intuitive. Many complex parameters have been pre-processed by the platform, allowing you to achieve results with just a few clicks—even beginners won't feel overwhelmed.

Another reassuring aspect is privacy protection. Once image generation is complete, the files are automatically deleted and not stored long-term—which is crucial when using portrait photos.

Of course, beyond just having fun, we can also take it a step further. AI body-swapping features like this aren't just for comedy or pranks. Sometimes, treating it as a visualization tool can be far more meaningful. For instance, some use it to simulate the physical changes that prolonged sleep deprivation and irregular eating habits might cause. This visual comparison serves as a more powerful wake-up call than simply reading health articles. Another example is when writing novels or designing game characters—it provides a highly efficient way to quickly generate visual references for diverse body types.

However, I must remind everyone that the technology itself is not the issue—it's how it's used that matters. Please limit your editing to your own photos, or only attempt to edit someone else's photos with their explicit consent. No matter how realistic the results may be, they should never be used for body shaming or to harm others.

Overall, with the advancement of AI image-to-image technology, effects that were once exclusive to professional photo editing have become accessible tools that anyone can easily use. If you're just curious about what you'd look like after “gaining weight,” or want to share a harmless joke with friends, why not give AIAI.com a try? After you've had a go, feel free to come back and share your experience—see for yourself how realistic the results really are.