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Known Participant
Oct 2, 2025 6:32 PM UTC
Open for Voting

Nano Banana generate tool changes size of image when generating

It's a consistent thing I am seeing when generating things like "new hair color" or altering anything about the image I am working with - the new generation is great, but is almost always different size from the original image, either stretched a little bit, or squished, or larger, or shifted in space, but never exactly perfectly blended with the original image - so it takes a bit of effort to blend the new generation back into the original image.
Seems like a bug vs. a feature to me 🙂

27.0.0 release
Mac OSX Sequoia 15.6.1

27 replies

Participant
Nov 5, 2025 1:09 AM UTC

This is what I get. Even i scale the canvas and image size to 1000x1000, it doesn't fix a thing

 

 

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Participant
Nov 4, 2025 4:14 PM UTC

When I use Nano banana to edit a section of the photo it streches, resizes and moves the generated image. I then have to realign the image. 

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Zebbler2Author
Known Participant
Nov 3, 2025 7:00 PM UTC

Amazing! Thanks for sharing, I'll try that on my next set of edits ❤️

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Participant
Nov 3, 2025 6:35 PM UTC

Yup that seems to 'solve' the problem. Obviously they ned to get this truly fixed but it's good to know about the workaround - thank you!

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tauntt
Participant
Nov 3, 2025 6:29 PM UTC

Not letting me update my last post. I had posted originally and it  didn't take. I copied and pasted it in a different browser and it somehow added $ signs and math lol.

-Change a 1000x1500 canvas to 1500x1500.

🙂

sidebar: can you not edit/delete your posts?

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tauntt
Participant
Nov 3, 2025 6:20 PM UTC

Found a workaround!

 

After trying several things, I realized that if you use anything other than a 1:1 canvas ratio (a perfect square), the image tends to stretch either horizontally or vertically during the generation process.

 

The quick fix that's been working for me is to extend the canvas size to match the largest side, which creates a 1:1 ratio.

 

Example:

-Change a $1000 \times 1500$ canvas to $1500 \times 1500$.

-Run your prompt. Since the canvas is square, the stretching should be eliminated.

-Crop the image back to its original dimensions.

 

It's a small extra step, but a very effective workaround for now.

 

Hope this helps!

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Participant
Oct 26, 2026 10:08 AM UTC

This is the way! Nano Banana is trained on 1:1 so it does weird things when you give it a random aspect ratio to work with.

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Participant
Nov 3, 2025 1:25 PM UTC

The same problem!

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Zebbler2Author
Known Participant
Nov 2, 2025 4:52 PM UTC

I couldn't with my current projects due to NDA nature of them (this is a public forum), but it literally happens pretty much every time, so I am surprised you even need proof here. Every time I use nano banana - it changes the scale or aspect ratio of the the image I am working on or have outlined in a rectangular marquee as a tutorial provided by Photoshop taught me to do.  I'll try to get you a non NDA sample when I get some free time, but I swear it should be super easy to replicate error, unless it somehow really only applies to me, which seems unlikely.

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Participating Frequently
Oct 30, 2025 11:08 PM UTC

I'm having the exact same issue. After using generative fill, the resulting image is stretched horizontally quite a bit, enough to notice and have to fix. It's especially weird with human subjects because their faces become quite thick and unrealistic. 

I'm on Sequoia 15.7.1
Photoshop 27.0.0

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Participant
Oct 23, 2025 5:42 PM UTC

Gemini 2.5 (Nana Banana) and FLUX is NOT showing up as on option when I enable Generative Fill. Only the lower quailty Firefly is available. Why is Gemini 2.5 not showing up anymore in the latest Beta version (27.0.1) of Photoshop. It WAS available in Beta 27.0. Can Adobe support quickly fix this issue?

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