> ## Documentation Index
> Fetch the complete documentation index at: https://dripart-docs-custom-nodes-sdk-v2-frontend.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# SamplerLCMUpscale - ComfyUI Built-in Node Documentation

> The SamplerLCMUpscale node provides a specialized sampling method that combines Latent Consistency Model (LCM) sampling with image upscaling capabilities.

The SamplerLCMUpscale node provides a specialized sampling method that combines Latent Consistency Model (LCM) sampling with image upscaling capabilities. It upscales the image progressively during the sampling process using various interpolation methods, allowing higher-resolution outputs to be generated in a single sampling pass. The output is a configured sampler object that can be connected to a sampling node.

## Inputs

| Parameter        | Description                                                                                                                         | Data Type | Required | Range                                                                     |
| ---------------- | ----------------------------------------------------------------------------------------------------------------------------------- | --------- | -------- | ------------------------------------------------------------------------- |
| `scale_ratio`    | The total scaling factor to apply during upscaling. A value of 1.0 keeps the original resolution (default: 1.0)                     | FLOAT     | Yes      | 0.1 - 20.0                                                                |
| `scale_steps`    | The number of steps to use for the upscaling process. Use -1 for automatic calculation based on the sampling schedule (default: -1) | INT       | Yes      | -1 - 1000                                                                 |
| `upscale_method` | The interpolation method used for upscaling the image at each upscaling step (default: "bislerp")                                   | COMBO     | Yes      | "bislerp"<br />"nearest-exact"<br />"bilinear"<br />"area"<br />"bicubic" |

`scale_ratio` and `scale_steps` are advanced parameters. The image is upscaled gradually from its original size to the target `scale_ratio` over the upscaling steps. When `scale_steps` is -1, the number of upscaling steps is calculated automatically as about half the number of sampling steps, with a minimum of 2; when a positive value is given, the node adjusts it internally and limits it based on the total number of sampling steps.

## Outputs

| Output Name | Description                                                                                                                  | Data Type |
| ----------- | ---------------------------------------------------------------------------------------------------------------------------- | --------- |
| `sampler`   | A configured sampler object that performs LCM sampling with progressive upscaling, ready to be used in the sampling pipeline | SAMPLER   |

> This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! [Edit on GitHub](https://github.com/Comfy-Org/embedded-docs/blob/main/comfyui_embedded_docs/docs/SamplerLCMUpscale/en.md)

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