> ## Documentation Index
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# SamplerSEEDS2 - ComfyUI Built-in Node Documentation

> This node provides a configurable sampler for image generation.

This node provides a configurable sampler for image generation. It implements the SEEDS-2 algorithm, which is a stochastic differential equation (SDE) solver. By adjusting its parameters, you can configure it to behave like several specific samplers, including `seeds_2`, `exp_heun_2_x0`, and `exp_heun_2_x0_sde`.

## Inputs

| Parameter     | Description                                                             | Data Type | Required | Range                  |
| ------------- | ----------------------------------------------------------------------- | --------- | -------- | ---------------------- |
| `solver_type` | Selects the underlying solver algorithm for the sampler.                | COMBO     | Yes      | "phi\_1"<br />"phi\_2" |
| `eta`         | Stochastic strength (default: 1.0).                                     | FLOAT     | No       | 0.0 - 100.0            |
| `s_noise`     | SDE noise multiplier (default: 1.0).                                    | FLOAT     | No       | 0.0 - 100.0            |
| `r`           | Relative step size for the intermediate stage (c2 node) (default: 0.5). | FLOAT     | No       | 0.01 - 1.0             |

**Note:** The node description defines the following sampler presets:

* `seeds_2`: default settings
* `exp_heun_2_x0`: `solver_type` = "phi\_2", `r` = 1.0, `eta` = 0.0
* `exp_heun_2_x0_sde`: `solver_type` = "phi\_2", `r` = 1.0, `eta` = 1.0, `s_noise` = 1.0

## Outputs

| Output Name | Description                                                             | Data Type |
| ----------- | ----------------------------------------------------------------------- | --------- |
| `sampler`   | A configured sampler object that can be passed to other sampling nodes. | 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/SamplerSEEDS2/en.md)

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