Cascade Extension 🤯 Stable Diffusion WebUI with INSANE New Technology | Install + Use Guide

20 Feb 202405:42

TLDRIn this guide, the user is shown how to install and use the Stable Cascade extension for the Stable Diffusion WebUI. The video highlights the benefits of this new technology, such as reduced VRAM usage and the ability to generate high-quality images without crashing the system. The process is straightforward: install the extension from a provided URL, apply the settings, and generate images by entering prompts. The video also demonstrates the generation of a race car with the word 'Zoom' on it, showcasing the AI's capability to create detailed images, albeit with some minor inaccuracies. The guide concludes by emphasizing the potential of this technology and its ease of use, especially for those with access to powerful graphics cards or cloud computing resources.


  • 🌟 The guide demonstrates how to use stable Cascade in an automatic 11's stable diffusion webUI.
  • 🔧 In a previous video, the installation and use of stable Cascade using their software was shown, highlighting its high VRAM usage.
  • 💻 To integrate stable Cascade into the stable diffusion web UI workflow, a new extension is introduced.
  • 📋 The first step is to have the stable diffusion web UI installed, either on a PC or in the cloud.
  • 🛠️ VRAM issues can be mitigated by using specific arguments when running the web UI.
  • 🔗 The extension is installed by visiting the 'extensions' tab and using the 'install from URL' feature with the provided link.
  • 🔄 After installing the extension, it needs to be checked and the UI restarted for it to take effect.
  • 🎨 The stable Cascade models are downloaded upon the first image generation, which requires significant storage space.
  • 🏎️ Examples are provided, such as generating an image of a race car with the word 'Zoom' written on it.
  • 🖼️ The generated images appear on the UI without previews, and the process can be quick if using a high VRAM graphics card.
  • 📈 The technology is praised for its potential, especially for images with readable text, though it's acknowledged that it's not perfect and still has room for improvement.

Q & A

  • What is the main topic of the guide?

    -The main topic of the guide is the installation and use of the stable Cascade extension in a Stable Diffusion WebUI.

  • What was the issue mentioned in the previous video regarding the stable Cascade software?

    -The issue mentioned was that the stable Cascade software uses a lot of VRAM and can cause the system to freeze or crash when the VRAM is maxed out.

  • How can one overcome the VRAM issues?

    -The VRAM issues can be mitigated by using specific arguments when running the stable Diffusion WebUI, as demonstrated in the guide.

  • What is the first step in using the stable Cascade extension?

    -The first step is to have an installation of the stable Diffusion WebUI on a PC or in the cloud.

  • How is the extension installed?

    -The extension is installed by going to the 'Extensions' tab and using the 'Install from URL' feature with the provided link in the description.

  • What happens after installing the extension?

    -After installing the extension, it needs to be checked in the 'Install' tab and the UI needs to be restarted. The first image generation will trigger the download of the stable Cascade models.

  • How long does it take to download the stable Cascade models?

    -It takes around 10 GB of data to download, and the time depends on the user's internet speed.

  • What is the difference between the stable Cascade UI and the new extension?

    -The new extension allows for the integration of stable Cascade into the stable Diffusion WebUI workflow, which was not possible with the previous stable Cascade software.

  • What kind of results can be expected from the stable Cascade extension?

    -The stable Cascade extension can generate high-quality images with readable text, although it may still have some inaccuracies like any AI.

  • What is the minimum resolution for stable Cascade images in the WebUI?

    -The minimum resolution is 1024x1024 pixels, as lower resolutions tend to result in less accurate images.

  • How does the stable Cascade extension perform on different hardware?

    -The performance varies; it can max out lower-end graphics cards but runs much quicker on more powerful hardware like 24 GB VRAM GPUs or cloud-based services.



🖥️ Installing Stable Cascade on Stable Diffusion Web UI

This paragraph outlines the process of integrating Stable Cascade with the Stable Diffusion Web UI. The speaker begins by discussing the resource-intensive nature of using Stable Cascade through its standalone software and highlights the benefits of incorporating it into the Web UI workflow via a new extension. The instructions include launching the Web UI, navigating to the extensions tab, and installing the SD Web Easy Stable Cascade Diffusers extension from a provided URL. The speaker shares personal experiences with optimizing VRAM usage and emphasizes the ease and speed of extension installation. It's noted that the Stable Cascade models are downloaded upon the first image generation, and the Web UI does not offer a preview but directly displays the generated image. The paragraph concludes with the speaker demonstrating the generation of an image with generic text and discussing the subsequent download of models.


🏎️ Generating Images with Stable Cascade

The second paragraph delves into the specifics of image generation using Stable Cascade. The speaker provides a detailed account of generating an image with a race car theme and the inclusion of the word 'Zoom' on the car. The process involves waiting for the models to download, which is estimated to be around 10 GB in size, and then running the inference to produce the image. The speaker shares the time taken for the first image generation and notes the system's ability to handle the workload without crashing. Further, the paragraph explores the generation of a more specific image with the 'Zoom' text, and the speaker comments on the outcome, highlighting the technology's capability to produce high-quality images, despite minor inaccuracies. The discussion also touches on the limitations of the Stable Cascade when pushing image resolution below 1024x1024, and the speaker concludes by expressing optimism about the continuous improvement of AI technology.



💡Stable Diffusion

Stable Diffusion is a type of artificial intelligence (AI) model used for generating images from textual descriptions. It's a deep learning technique that learns to produce high-quality images by training on a large dataset of text-image pairs. In the video, Stable Diffusion is the core technology behind the web UI and the extension discussed, which allows users to create images by inputting text prompts.

💡Cascade Extension

The Cascade Extension is a tool that integrates with the Stable Diffusion web UI, enhancing its capabilities. It allows for the use of the Stable Cascade models within the web UI environment, which was not natively supported before. This integration enables users to leverage the advanced features of Stable Cascade, such as higher-quality image generation, without the need for extensive VRAM (Video RAM) that the standard Cascade UI might require.


VRAM, or Video RAM, is a type of memory used to store image data that the GPU (Graphics Processing Unit) can quickly access. It is crucial for tasks such as gaming, video editing, and AI image generation, where high-speed data transfer is necessary. In the context of the video, VRAM is mentioned as a concern when running the Stable Diffusion web UI, as certain operations can be memory-intensive and may require a significant amount of VRAM to function smoothly.


WebUI stands for Web User Interface and refers to the visual interface used by users to interact with web applications. In this video, the WebUI is specifically for the Stable Diffusion AI model, allowing users to input text and generate images through a browser-based platform. The introduction of the Cascade Extension aims to improve the functionality and user experience of this WebUI.


In the context of web browsers and applications, extensions or add-ons are small software programs that enhance the functionality of the base platform. They can add new features, modify existing ones, or optimize performance. In the video, the user is guided on how to install an extension for the Stable Diffusion WebUI, which allows for the integration of the advanced image generation capabilities of Stable Cascade.

💡Image Generation

Image generation is the process of creating new images from scratch using AI models. It involves inputting a textual description or prompt, and the AI generates an image that matches the description. In the video, image generation is the primary function of the Stable Diffusion model and the Cascade Extension, where users can create a variety of images by simply entering text prompts.


AI, or Artificial Intelligence, refers to the simulation of human intelligence in machines that are programmed to think and learn like humans. In the context of the video, AI is used to create images from text descriptions. The Stable Diffusion and Cascade models are examples of AI technologies that have been trained on vast datasets to generate high-quality, realistic images.


Cloud computing refers to the delivery of computing services, such as storage, processing power, and software, over the internet rather than from a local server. In the video, the cloud is mentioned as a platform where users can run the Stable Diffusion WebUI and the Cascade Extension, leveraging powerful graphics cards that may not be accessible to most individuals.

💡Graphics Card

A graphics card is a hardware component in a computer system that renders images, pictures, and videos for output to a display. It is essential for tasks requiring intensive graphical processing, such as gaming, video editing, and AI image generation. In the video, the graphics card is discussed in relation to its capacity to handle the demands of running the Stable Diffusion model and the Cascade Extension.

💡Text Prompt

A text prompt is a textual input provided to an AI model to guide the output. In the context of AI image generation, a text prompt describes the image that the user wants the AI to create. The AI then uses this description to generate an image that matches the prompt as closely as possible.


Quality refers to the standard or level of excellence of something. In the context of the video, it pertains to the resolution and overall detail of the images generated by the AI models. Higher quality images have more detail and clarity, which is often a result of the model's ability to process and generate more complex visual data.


Introduction to using stable Cascade in automatic 11's stable diffusion webUI

Previous video discussed installation and use of stable Cascade with its software

Challenges with VRAM usage and integration with stable diffusion web UI workflow

New extension allows for integration of stable Cascade into stable diffusion web UI workflow

Instructions for installing stable diffusion web UI and navigating to the extensions tab

Installing the SD web easy stable Cascade diffusers extension from URL

Verification of extension installation and application restart

First image generation triggers download of stable Cascade models

Demonstration of image generation with generic text prompt

Generating an image with a specific prompt (race car with 'Zoom' written on it)

Comparison of inference time for first image generation

Stability of the system while running stable Cascade without crashing

Efficiency of running stable Cascade on powerful graphics cards and cloud services

Limitations of current stable Cascade Docker image availability for online use

Potential for high-quality image generation with stable Cascade

Adjusting image resolution and testing text clarity in generated images

Observations on the improvement and future potential of AI technology