## Overview

This node generates or edits images using ByteDance's Seedream models (versions 4.0, 4.5, and 5.0 Lite). It can create new images from a text prompt or edit existing images by providing reference images, supporting resolutions up to 4K.

## Inputs

| Parameter | Description | Data Type | Required | Range |
| --- | --- | --- | --- | --- |
| `prompt` | Text prompt for creating or editing an image. | STRING | Yes | N/A |
| `model` | The Seedream model version to use for generation. Each model has different capabilities and pricing. | COMBO | Yes | `"seedream 5.0 lite"`<br>`"seedream-4-5-251128"`<br>`"seedream-4-0-250828"` |
| `seed` | Seed to use for generation (default: 0). | INT | No | 0 to 2147483647 |
| `watermark` | Whether to add an "AI generated" watermark to the image (default: False). | BOOLEAN | No | True / False |

### Model-Specific Parameters

When you select a model, additional parameters become available:

- **Size Preset**: A dropdown to select a predefined image resolution. The available presets depend on the selected model.
- **Width**: The width of the generated image in pixels (default: 2048).
- **Height**: The height of the generated image in pixels (default: 2048).
- **Max Images**: The maximum number of images to generate (default: 1). When set to 1, sequential image generation is disabled.
- **Reference Images**: Up to 10 (for Seedream 4.0 and 4.5) or 14 (for Seedream 5.0 Lite) reference images for editing. Images must have an aspect ratio between 1:3 and 3:1.
- **Fail on Partial**: If enabled, the node will raise an error if not all requested images are generated successfully (default: False).

### Resolution Constraints

- **Seedream 5.0 Lite and 4.5**: Minimum resolution is 3.68 megapixels (e.g., 1920x1920).
- **Seedream 4.0**: Minimum resolution is 0.92 megapixels (e.g., 960x960).
- **All models**: Maximum resolution is 16.78 megapixels (e.g., 4096x4096).

### Image Count Constraints

- The total number of reference images plus generated images cannot exceed 15.
- For Seedream 5.0 Lite, a maximum of 14 reference images are supported.
- For Seedream 4.0 and 4.5, a maximum of 10 reference images are supported.

## Outputs

| Output Name | Description | Data Type |
| --- | --- | --- |
| `image` | The generated or edited image as a tensor. If multiple images were requested, they are concatenated into a single batch. | IMAGE |

> 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/ByteDanceSeedreamNodeV2/en.md)

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