Flux 2 Max Image to Image: Multi-Reference Photo Editing
Last verified: October 29, 2026
Flux 2 Max changes the photos you upload based on what you write in the prompt. Along with the standard ratios, it can return the edit in an ultrawide 21:9 frame or an ultra-tall 9:21 frame, so you can build the result for a website banner or a full-screen story from the start. Flux 2 Max image-to-image editing can start from one photo or from a set of references, and your written instructions control every change.
Black Forest Labs built Flux 2 Max for the highest editing consistency across tasks and the strongest prompt following of its FLUX.2 models. Both qualities matter for photo edits. Most jobs mean changing one thing, such as a background, a surface or a line of text, while the rest still looks like the same shot. Your instruction also has to be followed as written, not loosely interpreted.
The workflow is short: add your photos, write the instruction, choose a frame and a resolution, then download the finished image. The sections below cover which settings to start with, how to word an edit so the model reads it correctly, and what to do when a result misses.
Explore more image to image
Flux 2 Max Editing Specs at a Glance
The inputs, frame options and output you work with in this editor.
Input
Up to 8 images (JPG, JPEG, PNG or WEBP, up to 10 MB each) + a text prompt of up to 5,000 characters
Resolution
1K, 2K or 4K
Aspect Ratio
Auto, 1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 21:9, 9:21
Output
1 image per run
Prompting Tips for Sharper Flux 2 Max Edits
Lead the Prompt With the Change That Matters Most
Quote the Exact Words When Editing Signs and Labels
Pin Exact Colors With Hex Codes
How to Edit an Image With Flux 2 Max
Five steps take you from upload to download.
Add your photos in "Add Image"
Start with the photo you want to change. Then add any references the edit should draw from, such as a fabric pattern, a garment or a second product. The form needs at least one image before it can run. Leave out pictures that have no job in the edit: every upload should have a role you can name in the prompt.
Describe the edit in the "Prompt" box
Write what should change and what the finished image should look like. The box takes up to 5,000 characters, which is far more than an edit usually needs. If you only have a rough idea, click "Enhance Prompt" under the box to see fuller versions. Your own text stays as it is until you pick one of the suggestions.
Choose "Aspect Ratio" and "Resolution Quality"
"Aspect Ratio" starts on Auto and also offers 1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 21:9 and 9:21. Pick a fixed ratio when the image has a set destination, such as 21:9 for a site header or 9:21 for a full-screen phone story. "Resolution Quality" defaults to 1K, with 2K and 4K above it. Test the prompt at 1K and switch up only for the version you plan to keep, so the large render happens once the edit is right.
Click "Generate"
Each run returns one image. If it misses, change one thing at a time, like the wording of the change or the role you gave a reference, so you can tell which adjustment fixed it.
Download the result
Save the image and check it at full size before you use it. Look closely at faces, the edges of retextured surfaces and any lettering, because flaws there are easy to miss in a thumbnail.
Flux 2 Max or Another FLUX.2 Variant for Photo Edits
How Flux 2 Max compares with the other FLUX.2 models Black Forest Labs offers for editing.
| Criterion | Flux 2 Max | Alternatives | Best For |
|---|---|---|---|
| Final assets versus high-volume production | Black Forest Labs lists it as best for the highest quality and final assets. | FLUX.2 [pro] is the variant Black Forest Labs lists as best for production at scale. | Choose Flux 2 Max for hero images and client deliverables that have to hold up at full size, and FLUX.2 [pro] when you are running large batches of routine edits. |
| Edits where lettering is the main job | It has the reliable text rendering that Black Forest Labs documents for every FLUX.2 model, and it is the variant they point to for the highest quality. | FLUX.2 [flex] is the variant Black Forest Labs points to for typography and fine control. | Keep Flux 2 Max when text is one part of a bigger edit, and look at FLUX.2 [flex] when the image is mostly type, such as a poster or a label layout. |
| Number of references in one edit | It is documented for up to 8 reference images through the API and up to 10 in Black Forest Labs' playground. | FLUX.2 [klein] tops out at 4 reference images, both in the API and in the playground. | When an outfit, room or product composite needs more than four source photos, Flux 2 Max is the better fit; FLUX.2 [klein] only works for jobs that need four references or fewer. |
Fixing Common Flux 2 Max Editing Problems
What usually goes wrong with photo edits, and what to change before your next run.
I wrote 'no people' or 'no blur' and the edit ignored it
It took the style or background from the wrong photo
The edit changed parts of the photo I wanted to keep
My photo won't upload
Frequently Asked Questions
Which files can I upload to Flux 2 Max, and how many at once?
Add Image accepts JPG, JPEG, PNG and WEBP files of up to 10 MB each, at least 300×300 pixels, and you can add between one and eight images per run. A prompt is also required, so the form needs at least one image plus written instructions before it can generate.
Why does one generation cost more than another?
The credit cost of a run is calculated from the options you choose. Once you are signed in, it appears above the Generate button, so you see it before each run. Two things change it: the Resolution Quality you pick and the number of images you upload in Add Image. The Enhance Prompt button does not use credits.
Can Flux 2 Max turn a photo into a different art style?
Yes. Describe the look you want in the prompt, such as a gouache travel-poster illustration, a 35mm film still or a soft watercolor. Faithful representation of many different styles is one of the strengths documented for Flux 2 Max. Its character consistency also holds across styles, so a restyled portrait still looks like the same person.
To copy a look from a picture instead of describing it, upload that picture too and say in the prompt that it provides the style, for example 'subject from image 1, style from image 2'.
How long should a Flux 2 Max editing prompt be?
Medium-length prompts of about 30 to 80 words usually work best. Use 10 to 30 words for quick concepts and style exploration, and go past 80 words only for complex scenes that need detailed specifications. The Prompt box holds far more than that, so length is rarely the problem; clarity is. Spend the words on the change and the end result, not on stacked quality adjectives.
Can I write a structured JSON prompt instead of plain sentences?
Yes. FLUX.2 [pro] and [max] support JSON structured prompting, which is recommended for complex scenes and automated workflows. It uses keys such as scene, subjects, style and lighting, and you can include hex colors for each subject. Paste the JSON into the Prompt box as written. It helps most when an edit involves several objects that each need their own description.