Flux 3 for Architecture and Interior Design
Black Forest Labs' new image model, in Create and Edit. Change one material and the rest of the view stays put, compose a room from ten references, and output at native 4K.
Trusted by 20,000+ architects and designers
What Changes
An edit that respects the drawing
Four things Flux 3 does differently from the image models before it.
Workflow
How to Use Flux 3 in Fenestra
One view in, an edited or composed image out. Nothing to install and no model weights to manage.
Upload the view
A render, a viewport screenshot, a photograph or a sketch. JPG or PNG.
Pick Flux 3
From the model list in Create or Edit. Add up to nine reference images alongside the view.
Say what changes, and what stays
Name the edit and the parts to keep. Refer to references by number.
Download at the size you need
1K to explore, 2K for client review, 4K for the final board.
Model Facts
Flux 3 at a Glance
What the model is and what you get back from it in Fenestra.
4K native
Around 16 megapixels from the model, no upscaler in the chain
Black Forest Labs
The team behind Flux 2 Pro, Flux 2 Klein and Flux Kontext
1 October 2026
Released, and in Fenestra the same week
1K · 2K · 4K
Pick the output resolution per generation
10 references
Your view plus up to nine more images in one generation
Local edits
The parts of the image you do not mention are left as they were
Create + Edit
Text-to-image and image editing in one model
Commercial rights
Included on every paid plan
Your view plus a reference
Give it the room and a board of the pieces you want in it. Flux 3 places each at the right scale and keeps the rest of the room as drawn.
And the room it produces
The sofa, chairs, lamps and prints from the board, in the room from the view. The timber, the round window, the fireplace and the light are the ones you started with.
Edits
What to ask Flux 3 for
The edits that come back clean on architectural and interior views.
Material swap
Add furniture
Sky and season
Style transfer
Text and signage
Multi-reference composition
Prompts
Flux 3 Prompts for Architecture and Interiors
Four generations and the exact prompt behind each one. Say what should stay as well as what should change.
3D model to photoreal, with a reference
turn the 3D model into a photorealistic architectural rendering in Scotland, overcast light. Edit image 1 only; take the timber cladding, the standing-seam roof and the moorland planting from image 2
Driving rain, same frame
heavy rain, dark storm clouds rolling over the hills, wet grass, keep the house, the camera and the sheep exactly where they are
Winter, lights on, building unchanged
overcast winter afternoon, snow on the ground and the roof, interior lights on, keep the building, the sheep and the camera exactly as they are
New angle, same house
show the same house from a drone directly above the hillside, keep the materials, the chimney, the rocks and the sheep
What design teams say about Fenestra
More than 200,000 renders have been generated in Fenestra. Here is how practices use it on client work.
“Great tool for initial concepts. We provide new house and land packages and use Fenestra to update external colour scheme facade renders and floor plans for marketing purposes. Fenestra is a quick way to provide the images to clients to visualise their new home.
“Fenestra is a great tool and works really well for us. We’re using it to help establish a new internal standard for visualisation across the office, making it easier for high-quality visuals to become part of our standard project package.
“What sets Fenestra apart is the people behind it. The team is always available, genuinely listens to user needs, and provides a level of support that is responsive, approachable, and highly professional.
Plans & Pricing
For Teams & Enterprises
One shared credit pool, shared projects, and centralised billing
Common Questions
What architects and interior designers ask about Flux 3 before putting it on a client job.
Other Models and Guides
More on the models in Fenestra and the workflows they fit
