Ultimate SD Upscale Stable Diffusion Tutorial In 9 Minutes (Automatic1111)

Bitesized Genius
30 Jan 202409:20

TLDRThe video discusses the use of Ultimate SD Upscale, an extension for enhancing image detail through upscaling. It explains the installation process, the various options available within the UI, and their impact on image quality. The video provides a step-by-step guide on using the extension, including selecting the right settings for optimal results, and offers tips for refining images further. The presenter also touches on using the extension with Control Net for better performance on lower-end computers.


  • 🚀 Upscaling is a popular technique for enhancing image detail, with tools like Magnific and Ultimate SD Upscale.
  • 📱 Ultimate SD Upscale is a web UI extension that works by dividing images into tiles and impainting them at a higher resolution.
  • 🔧 Installation of Ultimate SD Upscale is done through the extension tab in the web UI, and it's only available under scripts in the image to image section.
  • 🎨 The extension offers various upscaling options, including custom sizing, different models for detail enhancement, and redrawing methods like linear, chess, or none.
  • 🔍 Tile width and height settings affect the granularity of detail and the overall processing time for upscaling.
  • 🌟 Mask blur and padding options help to reduce visible seams between tiles for a more cohesive final image.
  • 🛠️ Seams fix options include different methods for blending and refining the appearance of seams in the upscaled image.
  • 📈 The upscale checkbox enables the use of upscale options, which are essential for the extension to function effectively.
  • 💻 Ultimate SD Upscale can be combined with Control Net for better performance on systems with lower VRAM.
  • 🔄 Running an upscaled image through the extension again with reduced denoising strength can yield higher resolutions with fewer artifacts.
  • 📊 Finding the right balance between settings like denoising strength and tile size is crucial for achieving optimal upscaling results.

Q & A

  • What is the purpose of the 'Ultimate SD Upscale' extension?

    -The Ultimate SD Upscale extension is used to enhance the detail of images by dividing them into tiles, inpainting them, and thereby adding additional detail at a higher resolution, effectively upscaling the image with improved fidelity.

  • How can you install the 'Ultimate SD Upscale' extension?

    -You can install the 'Ultimate SD Upscale' extension by navigating to the web UI's extension tab, using the available tab to load the index, searching for 'Ultimate SD Upscale', pressing 'install', and then using the 'Apply and Restart UI' button. Alternatively, you can use the 'Install from URL' option.

  • What are the primary settings and options available within the 'Ultimate SD Upscale' extension?

    -Within the 'Ultimate SD Upscale' extension, you can decide the upscaled image size, choose from different upscaling models, select the method for redrawing the image, set tile width and height for rebuilding the image, adjust mask blur to reduce seam visibility, and control padding for considering neighboring tiles during processing.

  • What is the significance of the 'tile width and height' setting in the extension?

    -The 'tile width and height' setting determines the size of each tile used to rebuild the upscaled image. A higher value results in larger tiles, reducing the number of artifacts but potentially lowering detail, while a lower value increases the number of tiles, enhancing detail at the expense of longer processing times.

  • How does the 'mask blur' option affect the final image?

    -The 'mask blur' option applies a blur to the edges of the tiles to reduce the visibility of seams where the tiles meet, resulting in a more seamless and coherent final image.

  • What does the 'padding' option do in the context of image upscaling?

    -The 'padding' option specifies the number of pixels from neighboring tiles that will be considered when processing a tile. This helps in reducing the visibility of seams by taking into account surrounding information, leading to a more uniform image.

  • How can 'seams fix' options be used to improve the upscaled image?

    -The 'seams fix' options are designed to address visible grid lines or seams in the upscaled image by inpainting the seams to blend them with the rest of the image. There are different methods for seam fixing, each with varying effects on the appearance of seams.

  • What role does the 'upscale checkbox' play in the extension's functionality?

    -The 'upscale checkbox' enables the extension to utilize the upscale options, which are essential for enhancing the image's resolution and detail. It is enabled by default to ensure the extension performs its primary function of upscaling images.

  • Can the 'Ultimate SD Upscale' extension be used in conjunction with ControlNet on weaker computers?

    -Yes, the 'Ultimate SD Upscale' extension can be used with ControlNet to achieve similar upscaling results on weaker computers with lower VRAM, by selecting the 'tower resample' option and choosing ControlNet, thus optimizing the process for lower-spec hardware.

  • How can one achieve even higher resolutions without artifacts using the extension?

    -To achieve higher resolutions without artifacts, one can upscale an image multiple times with the extension, slightly decreasing the denoising strength each time. This step-by-step approach allows for gradual refinement and accumulation of detail, leading to a high-resolution image with minimal artifacts.



🖼️ Introducing Ultimate SD Upscale for Image Detail Enhancement

This paragraph introduces the concept of image upscaling and the popularity of premium tools like Magnific. It presents Ultimate SD Upscale as an alternative that can be integrated into one's workflow through an extension. The speaker explains that Ultimate SD Upscale is used within the image-to-image section of a web UI, dividing images into tiles for higher resolution upscaling. Installation instructions are provided, including navigating to the extension tab and using the install button. The paragraph also mentions a tutorial for a deeper understanding of the extension tab.


🛠️ Exploring Ultimate SD Upscale Options and Settings

The second paragraph delves into the options available within the Ultimate SD Upscale extension. It discusses the various settings for image size after upscaling, the selection of upscaling models, and the methods for redrawing images. The speaker explains the impact of tile width and height on artifacts and generation time, and the use of mask blur and padding to minimize visible seams. The paragraph also covers options for seams fix and the importance of using consistent settings with the upscale options to achieve the best results. A quick guide is provided for beginners on how to use the extension without scaling images, emphasizing the importance of using the same prompts for stable diffusion and adjusting denoising strength for minimal changes.




Upscaling refers to the process of increasing the resolution and detail of digital images. It's a technique used to make lower-resolution images appear sharper and more detailed on larger displays or for higher quality outputs. In the context of the video, upscaling is discussed in relation to tools like 'Magnific' and the 'Ultimate SD Upscale' extension, which allow for enhancement of image details beyond their original quality, sometimes even adding new details that weren't present in the initial image. The video focuses on how this process can be integrated into workflows to improve image quality automatically.

💡Ultimate SD Upscale

Ultimate SD Upscale is an extension designed for image enhancement, specifically mentioned in the video for its role in segmenting images into tiles and individually enhancing them to add detail. This tool is integrated into a user's workflow through the web UI's image-to-image section, where it uses algorithms to sharpen images and increase fidelity. The script provides options for customization of the upscaling process, including tile size and upscale method, to achieve the desired level of detail enhancement.


In the context of digital image processing, as described in the video, 'tiles' refer to equally sized portions into which an image is divided as part of the upscaling process. This division allows the Ultimate SD Upscale extension to apply detail enhancements to each segment individually, ensuring that the entire image benefits from increased resolution and detail. The choice of tile size can affect the balance between image generation speed and the fineness of details, with smaller tiles providing finer details at the cost of longer processing times.

💡Image-to-Image settings

Image-to-image settings are mentioned in the video as part of the configuration options for the Ultimate SD Upscale extension. These settings allow users to control how the upscaling affects the final image size, either by adhering to custom dimensions or scaling based on the original image size using a multiplier. This flexibility is crucial for tailoring the upscaling process to specific needs, ensuring that the enhanced image matches the desired output resolution.

💡Upscaler Models

Upscaler models refer to the different algorithms available within the Ultimate SD Upscale extension that can be chosen to sharpen and increase the fidelity of images. Each model uses a unique approach to enhance image quality, and the video suggests experimenting with different models to find the one that best suits the user's needs. The choice of an upscaler model can significantly impact the quality of the final image, affecting its clarity, detail, and overall appearance.


Seams are the visible lines that can appear between tiles after an image has been upscaled and reassembled from its divided segments. The video discusses various settings within the Ultimate SD Upscale extension to mitigate the visibility of seams, including mask blur and padding options. These settings aim to blend the edges of tiles smoothly into each other, reducing the likelihood of noticeable lines in the final image and ensuring a more cohesive and natural-looking result.


Denoising, in the context of the video, refers to the process of reducing or eliminating unwanted noise from images during the upscaling process. The video explains how denoising strength settings control the extent of change allowed from the original image, which is crucial for maintaining the image's integrity while enhancing detail. A properly adjusted denoising level can help achieve clearer, more detailed images without introducing artifacts or significantly altering the image's original composition.

💡Control Net

Control Net is briefly mentioned in the video as a tool that can be used in conjunction with the Ultimate SD Upscale extension to enhance images on computers with limited VRAM. It suggests that Control Net can optimize the upscaling process, making it more efficient for machines with less processing power. This compatibility enhances the accessibility of high-quality image upscaling for a wider range of users, regardless of their hardware capabilities.

💡Mask Blur

Mask blur is a setting within the Ultimate SD Upscale extension that applies a blur effect to the edges of tiles to minimize the appearance of seams. By blending the boundaries between tiles more smoothly, mask blur helps create a more unified and natural-looking image after upscaling. The video mentions adjusting this setting to demonstrate the effect of seams, indicating its importance in the fine-tuning process of image enhancement.


Padding in image upscaling, as described in the video, refers to the consideration of extra pixels from neighboring tiles when processing a specific tile. This setting is part of the Ultimate SD Upscale extension's toolkit to reduce the visibility of seams and ensure a more coherent image reconstruction. By adjusting the padding value, users can influence how much of the surrounding area is factored into the enhancement of each tile, potentially improving the integration of tiles into the overall image and minimizing artifacts.


Upscaling is a popular topic with the release of premium tools like Magnific, which can increase image detail and even add details that weren't originally present.

Ultimate SD Upscale is an extension for automatic image upscaling that can be integrated into your workflow.

The extension divides images into equally sized portions called tiles and imp paints them to build additional detail at a higher resolution.

Ultimate SD Upscale can be installed through the extension tab in the web UI by searching for it and pressing install.

The extension offers options to decide the size of an image after upscaling, including custom size, original size multiplier, and image to image settings.

Different upscaling models are available, each using various algorithms to sharpen and increase the fidelity of an image.

Three redrawing methods are provided: linear, chess, and none, which determine the order in which tiles are redrawn into the image.

Tile width and height settings determine the size of each tile used to rebuild the upscaled image, with higher values resulting in fewer artifacts and quicker generation times.

Mask blur helps reduce the visibility of seams between tiles by applying blur to the edges, while padding considers neighboring tiles during processing.

Seams fix options are available to further refine the image and blend the seams, with different methods applicable depending on the presence of a visible grid of lines.

The Denoising strength setting is crucial for controlling the amount of change allowed from the original image, with lower values ensuring consistency in detail and composition.

The Upscale checkbox enables the use of upscale options, which is required to maximize the extension's potential.

A quick guide is provided for using the extension without scaling images, involving copying the image into the image to image tab, resizing, and adjusting settings for optimal results.

Using the same prompts from image generation helps stable diffusion interpret the type of details to be captured, ensuring consistency with the original image.

Control net can be used in combination with Ultimate SD Upscale for better performance on weaker computers with low VRAM.

Upscaled images can be run through Ultimate SD Upscale again to achieve even higher resolutions with minimal artifacts by decreasing the denoising strength each time.

The video provides a comprehensive breakdown of the extension's options and their practical applications, offering valuable insights for users looking to enhance their image upscaling workflow.