Go from a rough idea to a useful image
The fastest way to learn a FLUX text-to-image generator is to make one clear image, inspect the result, and refine one variable at a time.
How to use FLUX AI for free on this page
Start with the default settings. They let you judge the prompt itself before extra controls complicate the result. Once the first image appears, decide whether the subject, composition, style, or format needs the most work.
Write one visual brief
Name the subject and setting first, then add the composition, medium, lighting, mood, and details that actually matter. Try: “A neighborhood record store after closing, rain on the windows, warm pendant lights, cinematic street photography, eye-level view.”
Generate with the defaults
Select Run and review the whole image before changing anything. Look at the main subject, framing, background, lighting, and any details the model misunderstood.
Refine one thing at a time
Make a focused prompt edit or adjust one setting. Keep the seed when you want a related variation; randomize it when you want a different composition.
Use FLUX AI for real creative tasks
A useful first draft has a destination. Set the intended format and composition in the prompt so the output is easier to finish in your usual design or editing app.
YouTube thumbnails and social posts
Ask for a bold focal point, clean visual hierarchy, and open space where a headline can be added later. Generate in a landscape, portrait, or square canvas that matches the platform.
Product and campaign concepts
Explore a setting, color story, lighting direction, or seasonal campaign before committing to a shoot. Describe the product category and visual treatment without using protected branding you do not control.
Editorial and presentation artwork
Build a visual metaphor for a blog post, newsletter, deck, or report. Specify an editorial illustration style and leave negative space for the page layout.
Characters, environments, and mood boards
Explore costumes, props, locations, and art direction for a game, story, pitch, or personal project. Treat the output as a concept to refine, not a substitute for a complete production workflow.
Know what each FLUX.1 control changes
Advanced Settings are most useful when you change them deliberately. Start with the defaults, then use the table below to choose the control that matches the problem you are trying to solve.
| Control | Range in this tool | When to adjust it |
|---|---|---|
| Width and height | 256–2048 px in 32 px steps | Choose a square, portrait, or landscape canvas for the final placement. |
| Seed | 0–2,147,483,647 or random | Reuse a seed to compare related variations; randomize it for a new starting composition. |
| Guidance scale | 1–15; default 3.5 | Adjust how strongly the image is steered toward the prompt. Higher is not automatically better. |
| Inference steps | 1–50; default 28 | Change the number of refinement steps used during generation. More steps do not guarantee a better image. |
Write better prompts for FLUX AI
Write like an art director, not a keyword vending machine. A practical formula is subject + setting + composition + medium or style + lighting + mood + defining details. Keep the important instructions concrete and remove adjectives that do not change what the image should look like.
You do not need every part of the formula in every prompt. Lead with the non-negotiables, then use later generations to tune the details.
Realistic product concept
“A matte green insulated bottle on a pale stone kitchen counter, soft morning window light, three-quarter product view, subtle condensation, premium lifestyle photography, warm neutral background.”
YouTube thumbnail background
“A surprised home cook looking at an enormous stack of pancakes, dynamic wide-angle composition, bright diner colors, strong subject separation, clean space on the left for a short headline, 16:9.”
Editorial illustration
“A freelancer balancing clocks, invoices, and coffee cups on a seesaw, modern editorial illustration, simple geometric shapes, navy and coral palette, generous negative space.”
When the result misses the brief
Replace a vague direction with something visible. Swap “make it dramatic” for “low-angle camera, hard side light, deep shadows, storm clouds.” If the layout is wrong, state the camera angle, crop, subject position, and empty space you need.
Finish the image before you publish it
AI output is a starting point. Zoom in and check hands, faces, edges, repeated objects, logos, labels, and small background details. For thumbnails, posters, packaging, or ads, add critical copy in a design app rather than relying on generated text for final accuracy.
Keep a record of the prompt, seed, settings, and any edits for work that needs to be reproduced or reviewed. Before publishing, confirm that you have the rights you need for the prompt, reference material, depicted people, brands, and intended use.
Can you use FLUX AI images commercially? Yes—with conditions
Yes. Under the current FLUX.1 [dev] Non-Commercial License v1.1.1, generated outputs may be used for commercial purposes. Black Forest Labs claims no ownership rights in those outputs, so you can use them in client work, advertising, products, and other commercial projects.
You are still responsible for what you create and publish. Review every image for unlawful or infringing content, disclose that AI was used when applicable law requires it, and make sure your prompt, source material, depicted people, logos, and brands do not violate someone else's rights. You may not use FLUX.1 [dev] output to train, fine-tune, or distill a model that competes with FLUX.1 [dev] or FLUX.1 Kontext [dev].
This permission covers generated images. It does not grant permission to use, distribute, deploy, or fine-tune the FLUX.1 [dev] model itself for commercial or production purposes.