This repository contains an unified ControlNet for FLUX.1-dev model released by Shakker Labs. We provide an online demo. A FP8 quantized version provided by community can be found in ABDALLALSWAITI/FLUX.1-dev-ControlNet-Union-Pro-2.0-fp8.

Keynotes

In comparison with Shakker-Labs/FLUX.1-dev-ControlNet-Union-Pro,

Remove mode embedding, has smaller model size.
Improve on canny and pose, better control and aesthetics.
Add support for soft edge. Remove support for tile.

Model Cards

This ControlNet consists of 6 double blocks and 0 single block. Mode embedding is removed.
We train the model from scratch for 300k steps using a dataset of 20M high-quality general and human images. We train at 512x512 resolution in BFloat16, batch size = 128, learning rate = 2e-5, the guidance is uniformly sampled from [1, 7]. We set the text drop ratio to 0.20.
This model supports multiple control modes, including canny, soft edge, depth, pose, gray. You can use it just as a normal ControlNet.
This model can be jointly used with other ControlNets.

Showcases

Inference

python

import torch
from diffusers.utils import load_image
from diffusers import FluxControlNetPipeline, FluxControlNetModel

base_model = 'black-forest-labs/FLUX.1-dev'
controlnet_model_union = 'Shakker-Labs/FLUX.1-dev-ControlNet-Union-Pro-2.0'

controlnet = FluxControlNetModel.from_pretrained(controlnet_model_union, torch_dtype=torch.bfloat16)
pipe = FluxControlNetPipeline.from_pretrained(base_model, controlnet=controlnet, torch_dtype=torch.bfloat16)
pipe.to("cuda")

# replace with other conds
control_image = load_image("./conds/canny.png")
width, height = control_image.size

prompt = "A young girl stands gracefully at the edge of a serene beach, her long, flowing hair gently tousled by the sea breeze. She wears a soft, pastel-colored dress that complements the tranquil blues and greens of the coastal scenery. The golden hues of the setting sun cast a warm glow on her face, highlighting her serene expression. The background features a vast, azure ocean with gentle waves lapping at the shore, surrounded by distant cliffs and a clear, cloudless sky. The composition emphasizes the girl's serene presence amidst the natural beauty, with a balanced blend of warm and cool tones."

image = pipe(
    prompt, 
    control_image=control_image,
    width=width,
    height=height,
    controlnet_conditioning_scale=0.7,
    control_guidance_end=0.8,
    num_inference_steps=30, 
    guidance_scale=3.5,
    generator=torch.Generator(device="cuda").manual_seed(42),
).images[0]

Multi-Inference

python

import torch
from diffusers.utils import load_image

# https://github.com/huggingface/diffusers/pull/11350
# You can directly import from diffusers by install the laster version from source
# from diffusers import FluxControlNetPipeline, FluxControlNetModel

# use local files for this moment
from pipeline_flux_controlnet import FluxControlNetPipeline
from controlnet_flux import FluxControlNetModel

base_model = 'black-forest-labs/FLUX.1-dev'
controlnet_model_union = 'Shakker-Labs/FLUX.1-dev-ControlNet-Union-Pro-2.0'

controlnet = FluxControlNetModel.from_pretrained(controlnet_model_union, torch_dtype=torch.bfloat16)
pipe = FluxControlNetPipeline.from_pretrained(base_model, controlnet=[controlnet], torch_dtype=torch.bfloat16) # use [] to enable multi-CNs
pipe.to("cuda")

# replace with other conds
control_image = load_image("./conds/canny.png")
width, height = control_image.size

prompt = "A young girl stands gracefully at the edge of a serene beach, her long, flowing hair gently tousled by the sea breeze. She wears a soft, pastel-colored dress that complements the tranquil blues and greens of the coastal scenery. The golden hues of the setting sun cast a warm glow on her face, highlighting her serene expression. The background features a vast, azure ocean with gentle waves lapping at the shore, surrounded by distant cliffs and a clear, cloudless sky. The composition emphasizes the girl's serene presence amidst the natural beauty, with a balanced blend of warm and cool tones."

image = pipe(
    prompt, 
    control_image=[control_image, control_image], # try with different conds such as canny&depth, pose&depth
    width=width,
    height=height,
    controlnet_conditioning_scale=[0.35, 0.35],
    control_guidance_end=[0.8, 0.8],
    num_inference_steps=30, 
    guidance_scale=3.5,
    generator=torch.Generator(device="cuda").manual_seed(42),
).images[0]

Recommended Parameters

You can adjust controlnet_conditioning_scale and control_guidance_end for stronger control and better detail preservation. For better stability, we highly suggest to use detailed prompt, for some cases, multi-conditions help.

Canny: use cv2.Canny, controlnet_conditioning_scale=0.7, control_guidance_end=0.8.
Soft Edge: use AnylineDetector, controlnet_conditioning_scale=0.7, control_guidance_end=0.8.
Depth: use depth-anything, controlnet_conditioning_scale=0.8, control_guidance_end=0.8.
Pose: use DWPose, controlnet_conditioning_scale=0.9, control_guidance_end=0.65.
Gray: use cv2.cvtColor, controlnet_conditioning_scale=0.9, control_guidance_end=0.8.

Resources

Acknowledgements

This model is developed by Shakker Labs. The original idea is inspired by xinsir/controlnet-union-sdxl-1.0. All copyright reserved.

Citation

If you find this project useful in your research, please cite us via

@misc{flux-cn-union-pro-2,
    author = {Shakker-Labs},
    title = {ControlNet-Union},
    year = {2025},
    howpublished={\url{https://huggingface.co/Shakker-Labs/FLUX.1-dev-ControlNet-Union-Pro-2.0}},
}