SDXL 1.0 in ComfyUI - Stable Diffusion

Sebastian Kamph
15 Jul 202306:00

TLDRIn this tutorial, the presenter demonstrates how to integrate the SDXL 1.0 workflow into ComfyUI for Stable Diffusion. They credit 'real Lucifer' for the base workflow and show how to set it up with minor adjustments. The process includes downloading models from Hugging Face, setting up ComfyUI, and customizing the workflow with prompts and settings. The video also covers how to use the refiner and upscaler for image generation, ensuring a simple setup for users to follow.

Takeaways

  • 😀 The video demonstrates how to set up SDXL within ComfyUI for Stable Diffusion XL.
  • 👨‍💻 The workflow is advanced but simple to set up, requiring only copy-pasting.
  • 🔍 The tutorial acknowledges the contribution of 'real Lucifer' who fine-tuned the workflow.
  • 📚 The presenter suggests visiting 'hugging face' to obtain the Stable Diffusion XL models.
  • 📁 Users need to download the 'save tensors' for both the base and refiner models.
  • 📂 The downloaded files should be placed in the 'checkpoints' directory within 'comfy models'.
  • 🖼️ If ComfyUI is not installed, the presenter recommends watching a ComfyUI installation video.
  • 🔄 The workflow involves loading a custom JSON file to set up the nodes in ComfyUI.
  • 🎨 The process includes setting up positive and negative prompts for image generation.
  • 🖼️ Users can adjust the image size and the number of images to generate.
  • 🔧 The workflow allows for customization, such as the number of steps for the base and refiner models.
  • 🔄 An optional upscaler step is included, which can be disabled if not required.
  • 🛠️ Missing nodes can be installed using the ComfyUI node custom nodes manager.

Q & A

  • What is the main topic of the video?

    -The main topic of the video is how to set up and run SDXL (Stable Diffusion XL) within Comfy UI.

  • Who is credited for fine-tuning the workflow used in the video?

    -The workflow was fine-tuned by a person named Real Lucifer.

  • What are the two main components of the Stable Diffusion XL model that need to be downloaded from Hugging Face?

    -The two main components are the Excel base and the refiner.

  • What should be done with the downloaded files from Hugging Face?

    -The downloaded files should be placed inside the 'checkpoints' folder in Comfy UI.

  • Is there a specific video to help with Comfy UI installation?

    -Yes, the video creator recommends checking their Comfy UI installation video for guidance.

  • What file format is used to load a custom workflow in Comfy UI?

    -A custom workflow in Comfy UI is loaded using a JSON file.

  • What are the two main prompts used in the workflow for generating images?

    -The two main prompts are the positive prompt and the negative prompt.

  • What is the native resolution for SDXL mentioned in the video?

    -The native resolution for SDXL is 1024 by 1024 pixels.

  • What is the purpose of the refiner in the workflow?

    -The refiner is used to add extra steps to the image generation process, enhancing the quality of the final image.

  • How can missing nodes in a workflow be fixed?

    -Missing nodes can be fixed by using the Comfy UI Node Custom Nodes Manager to install the missing custom nodes.

  • What additional feature is included in the workflow shown in the video?

    -The workflow includes an upscaler using nmkdcx to enhance the resolution of the generated images.

Outlines

00:00

🛠️ Setting Up Stable Diffusion XL in Comfy UI

This paragraph introduces a tutorial on integrating Stable Diffusion XL (SDXL) with Comfy UI, an advanced workflow that's easy to set up by copying and pasting configurations. The workflow has been fine-tuned by 'real Lucifer' and the presenter has made minor adjustments. The tutorial will guide viewers through downloading the necessary SDXL models from Hugging Face, including the refiner and the base model, and placing them in the 'checkpoints' directory of Comfy UI's 'models' folder. The presenter also mentions that the initial Comfy UI setup will differ from the final workflow and instructs viewers on how to load a custom JSON workflow. The workflow includes setting up positive and negative prompts, image size, and the number of images to generate. It also details the use of two nodes for checkpoints, running DPM++ 2M Karras samplers for both the base and refiner steps, and adjusting the total number of steps for each. The paragraph concludes with information on disabling the upscaler step if not desired.

05:02

📚 Customizing and Troubleshooting Comfy UI Workflows

The second paragraph continues the tutorial by showcasing another workflow for SDXL within Comfy UI, emphasizing the flexibility and customizability of the platform. It discusses the process of loading someone else's workflow and what to do if there are missing nodes, which can be resolved by using the Comfy UI node custom nodes manager. The guide reassures viewers that following the provided instructions will help fix errors related to missing custom nodes. The paragraph concludes with a hopeful message that viewers have learned something from the tutorial and a sign-off until the next video.

Mindmap

Keywords

💡SDXL

SDXL stands for Stable Diffusion XL, which is an advanced version of the Stable Diffusion model, a type of AI that generates images from text descriptions. In the video, the presenter is showing viewers how to integrate SDXL into ComfyUI, a user interface for AI image generation workflows.

💡ComfyUI

ComfyUI is a user-friendly interface designed to simplify the process of using AI models like Stable Diffusion for image generation. The video script describes how to set up a workflow within ComfyUI to utilize the capabilities of SDXL.

💡Workflow

A workflow in the context of this video refers to a sequence of steps or operations involved in a process. The presenter outlines an advanced workflow for setting up SDXL within ComfyUI, which is essentially a guide to follow for successful image generation.

💡Real Lucifer

Real Lucifer is mentioned as the individual who fine-tuned the workflow used in the video. The presenter credits this person for their contribution to the process and suggests that their adjustments have made the workflow more effective.

💡Hugging Face

Hugging Face is a platform where the presenter instructs viewers to go to obtain the Stable Diffusion XL models. It is a community and hub for AI models, and in the script, it is the source for the necessary files to run SDXL.

💡Checkpoints

In the context of AI and machine learning, checkpoints refer to the saved states of a model during training. In the script, the presenter mentions placing the downloaded SDXL models into the 'checkpoints' directory within ComfyUI.

💡Refiner

The refiner is a component of the Stable Diffusion XL model that is used to enhance the quality of generated images. The script describes how to set up the refiner within the ComfyUI workflow to improve the final output.

💡DPM++

DPM++ is an algorithm used in the Stable Diffusion model for image generation. The script mentions using DPM++ 2m, which is a specific version of this algorithm, for both the base and refiner steps in the workflow.

💡Upscale

Upscaling in image processing refers to increasing the resolution of an image. The video script describes an upscaling process using 'nmkdcx' after the image generation with SDXL to enhance the final image quality.

💡Custom Nodes

Custom nodes are user-defined components in ComfyUI that can be added to a workflow. The script mentions installing missing custom nodes if there are errors when loading a new workflow, which helps in integrating additional functionalities into the process.

💡JSON

JSON, or JavaScript Object Notation, is a lightweight data-interchange format that is easy for humans to read and write, and for machines to parse and generate. In the script, the presenter loads a custom workflow in JSON format into ComfyUI.

Highlights

Introduction to setting up SDXL within ComfyUI for Stable Diffusion.

Acknowledgment of Real Lucifer for fine-tuning the workflow.

Instructions to access and download Stable Diffusion XL models from Hugging Face.

Explanation of the process to request access to Stable Diffusion XL models.

Details on downloading the 'save tensors' file for both base and refiner models.

Guidance on placing the downloaded models into the 'comfy models' and 'checkpoints' directory.

Recommendation to watch the ComfyUI installation guide for those who haven't installed it yet.

Description of how to load a custom workflow in ComfyUI.

Demonstration of using a previous image in ComfyUI by drag and drop.

Overview of the workflow setup including positive and negative prompts.

Explanation of the refiner step and its role in the workflow.

Configuration details for image size and the number of images to generate.

Information on the use of multiple Samplers for the base and refiner models.

Description of the process to adjust the number of steps for the base and refiner models.

Details on the preview image generation and the role of the upscaler.

Instructions on disabling the upscaler step if not required.

Demonstration of adapting another user's workflow for SDXL in ComfyUI.

Solution for fixing errors related to missing custom nodes in ComfyUI.

Conclusion and sign-off for the tutorial video.

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