FLUX 3 Image
Lay out the image exactly how you want using bounding boxes.
Le Festival du SoleilFive frames of winterKnitted iceberg villageUp from the subway
Bounding boxes
Replay
Le Festival du Soleil, generated from bounding boxes and a scene prompt
View the element table 5 rows
[
{ "id": "Fr_Text_1", "bbox": [10, 200, 170, 800], "desc": "\"LE FESTIVAL DU SOLEIL\" written in a thin, elegant, serif typeface in a light cream color" },
{ "id": "town_1", "bbox": [280, 700, 420, 1000], "desc": "faint lights and small buildings of a coastal town at the foot of the hills" },
{ "id": "dome_1", "bbox": [250, 150, 650, 850], "desc": "a massive, smooth parabolic dome of pale concrete" },
{ "id": "swimmers_1", "bbox": [580, 200, 720, 800], "desc": "dozens of small, silhouetted figures scattered in the dark water, wading" },
{ "id": "crowd_1", "bbox": [740, 0, 1000, 1000], "desc": "a large crowd of people seated on the beach in casual, light-colored summer attire" }
]Text-to-image with strong prompt following and a native understanding of composition.
2:301 / 15
Prompt
A studio profile of a woman in a fuzzy mohair hood striped pale blue, orange and lime, tied under the chin.
Prompt
A fashion collage titled XU ZHI: a model in black fringed knitwear striding among clay sculptures on white.
Prompt
Four prototype race cars kick up spray on a wet, curving track, headlights glowing in the blue dusk.
Prompt
An exploded-view pencil drawing titled The Wooden Chair, with a warm wooden seat and labelled parts on cream paper.
Prompt
A lookbook lineup of five models in velvet, mohair and patent pieces against blocks of cobalt, rust and white.
Prompt
A studio portrait of a woman in a cream tee printed Manager in red, with red and yellow cuffs, on cobalt blue.
Prompt
A runway close-up of a model in a sparkling cobalt tinsel sweater over a lilac checked shirt.
Prompt
A 1975 Congo airmail stamp of two sprinters mid-stride, 150F, centered on a dark green felt background.
Prompt
A high-angle portrait of a woman with long braids in a sleek white headset, arms crossed, bathed in orange light.
Prompt
A design journal cover titled Tools in blue serif, with three towers of stacked wooden planks on white.
Prompt
An aerial view of a waterfall cascading through a dense, verdant forest into a misty pool.
Prompt
A coral and green risograph poster, The Seed Parade: giant seeds marching on root legs down a dotted street.
Prompt
A drone shot of two women in vast pleated red gowns fanned out on a dirt road through a banana plantation.
Prompt
A flat black graphic of a fedora with two round eyes peeking out from under the brim and two thin legs, on cream.
Prompt
A flash-lit film photo of a figure with a sky blue hoodie pulled over their head, arms out, on a leafy forest path.
Prompt
A studio profile of a woman in a fuzzy mohair hood striped pale blue, orange and lime, tied under the chin.
Prompt
A fashion collage titled XU ZHI: a model in black fringed knitwear striding among clay sculptures on white.
Prompt
Four prototype race cars kick up spray on a wet, curving track, headlights glowing in the blue dusk.
Prompt
An exploded-view pencil drawing titled The Wooden Chair, with a warm wooden seat and labelled parts on cream paper.
Prompt
A lookbook lineup of five models in velvet, mohair and patent pieces against blocks of cobalt, rust and white.
Prompt
A studio portrait of a woman in a cream tee printed Manager in red, with red and yellow cuffs, on cobalt blue.
Prompt
A runway close-up of a model in a sparkling cobalt tinsel sweater over a lilac checked shirt.
Prompt
A 1975 Congo airmail stamp of two sprinters mid-stride, 150F, centered on a dark green felt background.
Prompt
A high-angle portrait of a woman with long braids in a sleek white headset, arms crossed, bathed in orange light.
Prompt
A design journal cover titled Tools in blue serif, with three towers of stacked wooden planks on white.
Prompt
A studio portrait of a woman in a cream tee printed Manager in red, with red and yellow cuffs, on cobalt blue.
A runway close-up of a model in a sparkling cobalt tinsel sweater over a lilac checked shirt.
A 1975 Congo airmail stamp of two sprinters mid-stride, 150F, centered on a dark green felt background.
A high-angle portrait of a woman with long braids in a sleek white headset, arms crossed, bathed in orange light.
A design journal cover titled Tools in blue serif, with three towers of stacked wooden planks on white.
An aerial view of a waterfall cascading through a dense, verdant forest into a misty pool.
A coral and green risograph poster, The Seed Parade: giant seeds marching on root legs down a dotted street.
A drone shot of two women in vast pleated red gowns fanned out on a dirt road through a banana plantation.
A flat black graphic of a fedora with two round eyes peeking out from under the brim and two thin legs, on cream.
A flash-lit film photo of a figure with a sky blue hoodie pulled over their head, arms out, on a leafy forest path.
A studio profile of a woman in a fuzzy mohair hood striped pale blue, orange and lime, tied under the chin.
A fashion collage titled XU ZHI: a model in black fringed knitwear striding among clay sculptures on white.
Four prototype race cars kick up spray on a wet, curving track, headlights glowing in the blue dusk.
An exploded-view pencil drawing titled The Wooden Chair, with a warm wooden seat and labelled parts on cream paper.
A lookbook lineup of five models in velvet, mohair and patent pieces against blocks of cobalt, rust and white.
Image 1 of 15, 2:3. Prompt: A studio portrait of a woman in a cream tee printed Manager in red, with red and yellow cuffs, on cobalt blue.
Recolor wetsuit and boardSwap the subjectReplace one drawing
Bounding boxes
Before After Replay
Recolor wetsuit and board, edited box by box, with everything else unchanged
Use up to 10 references to create a thoughtfully designed image with less effort.
Times Square fitKids roomChicken houseAurora courtForest hollowAurora beach
Bounding boxes
Replay
Renders at full resolution so small details like textures, faces and colors are preserved.
4K Soba shop4K Red horse4K Housing estate4K Studio steps
ZoomLoupeReplay
Soba shop, 5456 × 3072 pixels, all from the model.
Add two divers
Replace the duck
New sofa
Print on a shirt
Recolor hair
WipeDifferenceReplay
Add two divers, before and after a pixel-perfect edit
BeforeAfter
Before
After
FLUX 3 Image is natively trained to understand image layout and composition. An agent can use the model to easily create well-composed images with just a text prompt.
Swan Lake, from the wingsUp from the subwayDinner by the gardenTools, the magazineSixteen layouts
Bounding boxes
Replay
Swan Lake, from the wings, generated inside a layout the agent planned
Commercial weights
FLUX 3 Image is available under a commercial weights license for companies running image generation at scale. Fine-tune and deploy it on your own infrastructure. Reach out to us to learn more.
Make things with FLUX 3 Image.
Use bounding boxes to compose or edit images, render in native 4K, and make pixel-perfect edits.
Try it Read the docs
What is FLUX 3 Image?
FLUX 3 is Black Forest Labs' multimodal model for video, audio, images and actions. FLUX 3 Image is the part that generates and edits images. You place every element on a canvas with a bounding box, then edit the finished image one box at a time.
How do bounding boxes work?
Drag out a box for every element that matters and describe what goes in it. Then give the scene one line that ties the elements together, and FLUX 3 renders it with every element inside its box. Whatever aspect ratio you pick, the canvas is a 0 to 1000 grid on both axes, and each box is written as \[y\_min, x\_min, y\_max, x\_max\].
What does a layout prompt look like?
It has two parts. A global caption describes the whole image in one paragraph. An element table follows it, a JSON array with one row per element, and each row carries an id, a bounding box and a description. The caption cites every element by its id, like animal\_1, where that element first appears.
Do I have to draw every box myself?
No. Give the agent one line and an aspect ratio, and an LLM plans the layout for you. It writes a caption and an element table, with a box and a semantic id for everything that matters. Every box stays editable, so move the ones you don't like and FLUX 3 generates inside the rest as the agent placed them.
Can I edit an image I already made?
Yes, and you can make several targeted edits at once. Each box can be re-described, replaced with something else or moved. Everything you didn't touch stays exactly where it was, so an image holds together across one round of edits after another.
Does FLUX 3 change the boxes I draw?
No. A prompt upsampler turns your short request into the dense caption FLUX 3 was trained on. It may write the caption around your boxes and suggest more elements, but every box you drew reaches the model verbatim, with the same id and the same coordinates. Anything the upsampler adds survives only if the caption refers to it.
What kinds of images suit bounding boxes?
Compositions with many parts in strict relationships. Type set around a photograph, collages and panel grids, editorial spreads, or a crowded scene where every face has its place.
How can I try FLUX 3 Image?
Draw the boxes by hand in the Playground, or send a layout prompt to FLUX 3 on the BFL API. Open the Playground