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Image GenerationFlux Pro Fill
Flux Pro FillPixio image systemBuilt for controlled visual output

Flux Pro Fill

Use a mask to fill or replace selected areas (e.g. new background, object, or outfit) while keeping the rest of the image intact. Great for localized, non-destructive edits.

Pixio read

The best image results come from specific composition, style, and lighting language. Be explicit about what should be in frame and what should feel dominant.

Open in PixioStudy the workflow

Best results start with a precise subject, composition, and style direction.

Why creators use it
Composition drives quality
Lighting direction matters
Great for polished finals
Prompt
Creation input
Edit
Workflow behavior
Style
Consistency control
Finals
Design fit
Pixio briefing

How to get the best out of Flux Pro Fill

Generate
Best when you need a fresh composition from text and direction.
Key art, concepts, campaigns, exploration.
Edit
Best when the composition is already there and only selected parts need to change.
Inpainting, replacements, polish passes, localized control.
Reference
Best when a subject, style, or visual identity needs to remain consistent.
Character systems, branded visuals, multi-image continuity.
Basic Info

Flux Pro Fill on Pixio is Black Forest Labs' Flux Pro-based fill or inpainting-style model: fill masked regions or extend images with Flux Pro quality. Use it when you need to add or replace content in a region (mask or edge) with Flux coherence and detail.

Flux Pro Fill

Flux Pro Fill on Pixio is Black Forest Labs' Flux Pro-based fill or inpainting-style model: fill masked regions or extend images with Flux Pro quality. Use it when you need to add or replace content in a region (mask or edge) with Flux coherence and detail.

Use this when

  • You need to fill a masked region or extend an image (e.g. outpainting) with Flux Pro quality.
  • You want Flux-level coherence and detail when adding or replacing content in a defined area.
  • You are compositing, extending, or fixing part of an image without full-image edit.
  • You prefer Flux Pro Fill over Flux Dev Inpainting when Pro Fill fits your workflow (check Pixio for exact mode: inpainting vs outpainting vs both).
  • You want reliable fill results that blend with the surrounding image.

Modes in Pixio

ModeInputBest for
Fill / InpaintingImage + mask + promptFill or replace masked region with Flux Pro quality
OutpaintingImage + prompt (check Pixio)Extend image beyond edges if supported

Options

OptionValuesNotes
ImageYour uploadBase image
MaskYour mask (region to fill) or edgesDefines area to fill or extend
PromptYour textWhat to generate in the filled region
StrengthLow–High (check Pixio)How much to change the region
CreditsPlan-basedCheck model card in Pixio

Credits

Credits are plan-based; check the model card in Pixio for your plan and cost per image.

Prompt structure

Learn in the Academy

Step-by-step lessons, hands-on prompts, and a quiz to master Flux Pro Fill.

Open course

Use in Pixio

Open Pixio Generate and try Flux Pro Fill right now.

Quick reads
Composition drives quality
Lighting direction matters
Great for polished finals
Options and credits
Prompting
Subject + composition + lighting + style
Be explicit about what leads the frame.
References
Optional
Use when subject or brand identity must hold.
Edits
Mask or prompt changes
Change only the weak area whenever possible.
Practical playbook
Use these heuristics to get cleaner, more controllable outputs without wasting runs.
PreviousFlux Pro
NextFlux Pro Fill Finetuned
Prompt architecture
Build the output like a creative brief.
[Subject] + [Style] + [Composition] + [Lighting] + [Background] + [Quality Intent]
Prompt demo
Luxury skincare bottle on wet black stone, centered composition, soft magenta rim light, cool studio fill, shallow reflections, premium editorial product photography.

A strong image prompt defines the subject, composition, lighting, and finish instead of leaving them implied.

Modes and controls
Build the frame from text
Generate

[What to put in the filled region]. Describe only the content for the fill (e.g. "blue sky with clouds", "same person smiling", "continue the forest"). Match lighting and style to the rest of the image for a seamless result.

Example prompts

"Blue sky with soft clouds. Match the lighting of the scene."

"Same person, smiling. Natural expression. Match skin tone and lighting."

"Continue the landscape to the right. Same style and lighting. Seamless."

"Bookshelf with books. Same interior style. Seamless blend."

When to use Flux Pro Fill vs other models

ScenarioBest choice
Flux Pro fill / inpaintingFlux Pro Fill
Flux Pro Fill finetunedFlux Pro Fill Finetuned (if available)
Flux Dev inpaintingFlux Dev Inpainting
SDXL inpaintingSDXL Inpainting
Full-image Flux editFlux 2 Pro Edit

Tips

  • Mask only the region you want to fill or replace; the rest of the image is preserved.
  • Describe the filled content clearly and match lighting and style to the surrounding image.
  • One main fill per mask for predictable results; use multiple passes if needed.
  • Check Pixio for whether outpainting (extend) is supported and how to use it.
Open Generate
1

Tell the model what should dominate the frame first.

2

Use lighting language early; it changes everything downstream.

3

When editing, describe what stays, not just what changes.

4

References help when continuity matters more than novelty.

Use precise visual language to control subject, composition, lighting, and style from the start.

Change only what matters
Edit

Preserve the useful parts of the image while steering the rest with masks, references, or prompt edits.

Hold the identity together
Reference

Bring in reference images or LoRAs when consistency is more important than exploration.

Prompt
Creation input
Edit
Workflow behavior
Style
Consistency control
Finals
Design fit
Best use cases
1

Flux Pro Fill is strongest when the visual brief is specific about framing, style, and what should read first.

2

Use it for campaign images, product shots, subject consistency, or polished concept work.

3

When editing, say exactly what changes and what must remain untouched.

Pixio workflow
Step 01
Define the frame

Lock the subject, composition, and lighting direction before you chase style nuance.

Step 02
Protect consistency

Use references or edits when the same subject, style, or layout has to survive across versions.

Step 03
Polish to finals

Once the frame works, refine only the weak areas instead of rewriting the whole composition.

Best paired with
Upscale

Finish strong compositions by scaling them without rebuilding the frame from scratch.

Pixio Image Edit

Use editing tools after the initial generation when the composition is right but the details still need polish.