nullquant-ComfyUI-BrushNet

May 11, 2024. Image batch is implemented. You can even add BrushNet to AnimateDiff vid2vid workflow, but they don't work together - they are different models and both try to patch UNet. Added some more examples.

May 6, 2024. PowerPaint v2 model is implemented. After update your workflow probably will not work. Don't panic! Check end_at parameter of BrushNode, if it equals 1, change it to some big number. Read about parameters in Usage section below.

May 2, 2024. BrushNet SDXL is live. It needs positive and negative conditioning though, so workflow changes a little, see example.

Apr 28, 2024. Another rework, sorry for inconvenience. But now BrushNet is native to ComfyUI. Famous cubiq's IPAdapter Plus is now working with BrushNet! I hope... :) Please, report any bugs you found.

Apr 18, 2024. Complete rework, no more custom diffusers library. It is possible to use LoRA models.

Apr 11, 2024. Initial commit.

Plans

BrushNet SDXL
PowerPaint v2
Image batch
Compatibility with jank HiDiffusion and similar nodes

Installation

Clone the repo into the custom_nodes directory and install the requirements:

git clone https://github.com/nullquant/ComfyUI-BrushNet.git
pip install -r requirements.txt

Checkpoints of BrushNet can be downloaded from here.

The checkpoint in segmentation_mask_brushnet_ckpt provides checkpoints trained on BrushData, which has segmentation prior (mask are with the same shape of objects). The random_mask_brushnet_ckpt provides a more general ckpt for random mask shape.

segmentation_mask_brushnet_ckpt and random_mask_brushnet_ckpt contains BrushNet for SD 1.5 models while segmentation_mask_brushnet_ckpt_sdxl_v0 and random_mask_brushnet_ckpt_sdxl_v0 for SDXL.

You should place diffusion_pytorch_model.safetensors files to your models/inpaint folder.

For PowerPaint you should download three files. Both diffusion_pytorch_model.safetensors and pytorch_model.bin from here should be placed in your models/inpaint folder.

Also you need SD1.5 text encoder model model.fp16.safetensors from here. It should be placed in your models/clip folder.

This is a structure of my models/inpaint folder:

Yours can be different.

Usage

Below is an example for the intended workflow. The workflow for the example can be found inside the 'example' directory.

Parameters

Brushnet Loader

dtype, defaults to torch.float16. The torch.dtype of BrushNet. If you have old GPU or NVIDIA 16 series card try to switch to torch.float32.

Brushnet

scale, defaults to 1.0: The "strength" of BrushNet. The outputs of the BrushNet are multiplied by scale before they are added to the residual in the original unet.
start_at, defaults to 0: step at which the BrushNet starts applying.
end_at, defaults to 10000: step at which the BrushNet stops applying.

Here are examples of use these two last parameters.

PowerPaint

CLIP: PowerPaint CLIP that should be passed from PowerPaintCLIPLoader node.
fitting: PowerPaint fitting degree.
function: PowerPaint function, see its page for details.

When using certain network functions, the authors of PowerPaint recommend adding phrases to the prompt:

object removal: empty scene blur
context aware: empty scene
outpainting: empty scene

Many of ComfyUI users use custom text generation nodes, CLIP nodes and a lot of other conditioning. I don't want to break all of these nodes, so I didn't add prompt updating and instead rely on users. Also my own experiments show that these additions to prompt are not strictly necessary.

The latent image can be from BrushNet node or not, but it should be the same size as original image (divided by 8 in latent space).

The both conditioning positive and negative in BrushNet and PowerPaint nodes are used for calculation inside, but then simply copied to output.

Be advised, not all workflows and nodes will work with BrushNet due to its structure. Also put model changes before BrushNet nodes, not after. If you need model to work with image after BrushNet inference use base one (see Upscale example below).

SDXL

workflow

IPAdapter plus

workflow

LoRA

workflow

Blending inpaint

Sometimes inference and VAE broke image, so you need to blend inpaint image with the original: workflow. You can see blurred and broken text after inpainting in the first image and how I suppose to repair it.

ControlNet

workflow

ControlNet canny edge

ELLA outpaint

workflow

Upscale

workflow

To upscale you should use base model, not BrushNet. The same is true for conditioning. Latent upscaling between BrushNet and KSampler will not work or will give you wierd results. These limitations are due to structure of BrushNet and its influence on UNet calculations.

Image batch

workflow

PowerPaint outpaint

workflow

PowerPaint object removal

workflow

It is often hard to completely remove the object, especially if it is at the front:

You should try to add object description to negative prompt and describe empty scene, like here:

Notes

Unfortunately, due to the nature of BrushNet code some nodes are not compatible with these, since we are trying to patch the same ComfyUI's functions.

List of known uncompartible nodes.

I will think how to avoid it.

Credits

The code is based on