SDXL Lightning is SUPER FAST! Only 2 Steps to Render!

Olivio Sarikas
21 Feb 202406:24

TLDRIn this video, the presenter introduces SDXL Lightning, a tool that can render SDXL images in just two steps, making it incredibly fast. The workflow is basic but functional, and for patrons, a more advanced workflow is available, complete with additional features and a comprehensive video guide. The process involves downloading a workflow file, saving it as a JSON file, and using it with the Lura files, which are small in size and can be experimented with for quality. The video demonstrates how to use the tool with Comu, an AI model, and emphasizes the effectiveness of the four-step Lura for better quality. The presenter also discusses the importance of the sampler and scheduler settings for optimal results. The tool is particularly effective for images with a large subject and can produce detailed images quickly. The video concludes with a demonstration of the Ultimate SD upscaler, which can further enhance the image quality without altering the content, resulting in a detailed 2048x2048 SDXL image in just 20 seconds. The presenter promises to share a more detailed workflow with patrons and encourages viewers to experiment with the tool for impressive results.


  • 🚀 SDXL Lightning is a highly efficient method for rendering SDXL images, boasting a super-fast process that only requires two steps.
  • 📚 A basic workflow is provided for users to follow, while Patron supporters have access to an enhanced workflow with additional features and a comprehensive explanation video.
  • 🔗 The Hugging Face page is mentioned as a resource where users can find more information and download the workflow.
  • 📂 Users are instructed to save the workflow file in a specific location on their hard drive and to download the necessary Lura files from the SDXL Lightning page.
  • 🎨 Different Lura files correspond to different steps (two-step, four-step, eight-step), offering varying levels of quality and detail in the rendered images.
  • 🔄 The process involves uploading the workflow, using the Lura model loader, and setting up prompts and latent images for image generation.
  • 📱 The script mentions that the current setup works best with 1024x1024 image size, and that the image quality may vary depending on the step count and CFG count.
  • 🌟 The video highlights the potential of upscaling images using ultimate SD upscale or similar methods, which can significantly improve image detail and quality.
  • ⏱️ An impressive example is given, demonstrating that a detailed 2048x2048 SDXL image can be rendered on a 3080ti in just 20 seconds.
  • 🎥 The video creator plans to share an expanded workflow with Patreon supporters, indicating ongoing development and support for this technology.

Q & A

  • What is the main feature of SDXL Lightning?

    -The main feature of SDXL Lightning is its ability to render SDXL images in only two steps, making it a very fast process.

  • Who gets access to the more advanced workflow for SDXL Lightning?

    -The more advanced workflow is available to the creator's Patron supporters.

  • What file type is used for the basic workflow?

    -The basic workflow is saved as a .json file.

  • What is the recommended image size for the initial SDXL Lightning render?

    -The recommended image size for the initial render is 1024 by 1024 pixels.

  • What is the role of the 'ultimate upscaler' in the process?

    -The 'ultimate upscaler' is used to upscale the image without significantly changing its content, resulting in a detailed and high-resolution image.

  • What is the file size for each Lura file mentioned in the script?

    -Each Lura file is approximately 394 megabytes in size.

  • What are the different steps available for the Lura model?

    -The different steps available for the Lura model are two-step, four-step, and eight-step.

  • How long does it take to render a 2048x2048 SDXL image on a 3080ti using the described method?

    -It takes 20 seconds flat to render a 2048x2048 SDXL image on a 3080ti using the described method.

  • What is the recommended approach for images with a large subject in the frame?

    -For images where the subject is large in the frame, the process works best and yields beautiful details upon upscaling.

  • Why might the initial render not be very sharp or crisp?

    -The initial render might not be very sharp or crisp due to the low step count and low CFG count used in the process.

  • What is the recommended upscaling method to maintain the image content?

    -The recommended upscaling method to maintain the image content is by using ultimate SD upscale or a similar upscaling method.

  • What does the creator plan to do for Patreon supporters?

    -The creator plans to upload a fleshed-out workflow for Patreon supporters, providing more control and detailed instructions.



🚀 Introduction to SDXL Lightning and Workflow Setup

The speaker begins by greeting the audience and introducing SDXL Lightning, a tool that can render SDXL images efficiently. They mention a basic workflow and highlight that there's a more advanced version available to Patron supporters, which includes additional features and a detailed explanation video. The speaker then guides the audience through downloading a workflow file from the Hugging Face page and saving it as a JSON file on their hard drive. They also explain how to download Lura files from the SDXL Lightning page and place them in the appropriate folder within their system. The focus is on the four-step Lura model, which is noted to provide better quality. The speaker also discusses the use of the Lura model within the comu I software, the importance of the sampler and scheduler settings, and the process of creating an image with a specific size and level of detail. The summary emphasizes the speed of image creation and the potential for future improvements with more specialized models.


🎨 Upscaling SDXL Images with Ultimate SD Upscale

The speaker demonstrates how to upscale SDXL images using the Ultimate SD Upscale method. They explain that the current process works best for images with a prominent subject and that the level of detail can be enhanced by upscaling. The speaker uses the 4X n mkd upscale SP model and shares the surprising effectiveness of using the same settings in the Ultimate SD Upscale as in the previous step. The result is a detailed 2048x2048 SDXL image that renders quickly on a 3080ti. The speaker encourages the audience to experiment with the Lura model and expresses excitement about sharing a more comprehensive workflow with Patreon supporters. They conclude by thanking the audience, inviting likes for the video, and teasing future content.



💡SDXL Lightning

SDXL Lightning is a method or tool mentioned in the video that allows for the rendering of SDXL images. It is significant because it is described as 'SUPER FAST' and is the central focus of the video's demonstration. The script details a workflow that utilizes SDXL Lightning to achieve quick rendering in just two steps, which is a notable feature for those interested in efficient image processing.


A workflow in the context of this video refers to a series of steps or processes that are followed to complete a particular task, in this case, rendering SDXL images. The video script mentions a basic workflow and also hints at a more advanced one available to Patron supporters. Workflows are essential for understanding the process of using SDXL Lightning effectively.

💡Hugging Face Page

The Hugging Face Page is a specific webpage mentioned in the script where viewers can find more information about the SDXL Lightning tool. It is used as an example to demonstrate how one can access and utilize the tool, indicating that it is a resource for users to engage with the technology presented in the video.

💡Lura Files

Lura Files, or Lora files, are referenced as essential components for the SDXL Lightning process. They are described as being small in size but crucial for the rendering of images. The script discusses downloading these files and placing them in specific folders, highlighting their importance in the overall process.

💡Two-Step, Four-Step, Eight-Step

These terms refer to different levels or stages in the SDXL Lightning rendering process. The script suggests that there are variations in the process that can be chosen based on the desired outcome, with the two-step being the fastest but the four-step offering better quality. These steps are integral to understanding the flexibility of the rendering process.

💡Automatic 1111

Automatic 1111 seems to be a software or platform mentioned in the script where the Lura files are made visible and utilized. It is part of the technical setup required for the SDXL Lightning process to work. The mention of Automatic 1111 provides insight into the software requirements for using the tool.


In the context of the video, a checkpoint is a specific version or state in the image rendering process. The script mentions 'chuggernaut XL version 8' as an example, indicating that different checkpoints can be used, potentially affecting the outcome of the rendered image.

💡CFG Count

CFG Count likely refers to a configuration setting or parameter related to the image rendering process. It is mentioned in the context of affecting the sharpness and detail of the final image. A low CFG count is associated with faster rendering but less detail.

💡Ultimate SD Upscale

Ultimate SD Upscale is an upscaling method or tool discussed in the video for improving the detail of the rendered images without changing their content. It is presented as a complementary technique to SDXL Lightning, used to enhance the final output.


Patrons, in the context of this video, are supporters who receive additional content or a more detailed workflow for using SDXL Lightning. The mention of Patrons indicates a tiered system of content access, where additional support leads to more comprehensive resources.

💡VAE Decoder

VAE Decoder, or Variational Autoencoder Decoder, is a component in the rendering process that is used to decode or transform the latent image into a more detailed format. It is part of the technical aspects of the workflow and contributes to the final image quality.


SDXL Lightning is a tool that can render SDXL images in just two steps.

A basic workflow is included, but Patron supporters get an enhanced version with additional features.

The hugging face page demonstrates the process, which can be as simple as one step, though currently it's two steps.

Downloading the workflow involves accessing a raw file and saving it with a specific JSON format.

Lura files are required for the process and can be downloaded in various step counts for different quality levels.

The four-step Lura file is noted for its balance between quality and speed.

Lura files need to be placed in a specific folder for the tool to recognize them.

The future may bring compatibility with automatic 1111, but for now, the Lura file must be manually placed.

An ultimate upscaler is added to the workflow for higher quality images.

The upscaling process works exceptionally well with the ultimate upscaler, maintaining image content.

The checkpoint used in the demonstration is Chuggernaut XL version 8, which is compatible with the process.

The two-step Lura model is used in the demonstration, but the four-step model can also be utilized.

The process works best with 1024x1024 images for the moment.

The image quality is affected by the step count and CFG count, but the rendering speed is very fast.

The method is particularly effective for images with a large subject, producing beautiful details.

The presenter anticipates future improvements with more specialized models for this process.

Ultimate SD upscale or similar methods are recommended for upscaling without significantly altering the image content.

The presenter demonstrates an upscaled 2048x2048 SDXL image rendered in 20 seconds on a 3080ti.

The video concludes with a teaser for a more detailed workflow upload for Patreon supporters.