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# TencentSmartTopologyNode - ComfyUI Built-in Node Documentation

> Complete documentation for the TencentSmartTopologyNode node in ComfyUI. Learn its inputs, outputs, parameters and usage.

> 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/TencentSmartTopologyNode/en.md)

This node performs smart retopology on a 3D model, automatically creating a new, cleaner mesh with optimized polygon count. It connects to a Tencent Hunyuan 3D API to process the model, supporting GLB and OBJ file formats up to 200MB. The node returns the processed model as an OBJ file.

## Inputs

| Parameter      | Data Type | Required | Range                                 | Description                                                                                                  |
| -------------- | --------- | -------- | ------------------------------------- | ------------------------------------------------------------------------------------------------------------ |
| `model_3d`     | FILE3D    | Yes      | -                                     | Input 3D model (GLB or OBJ). The file must be in GLB or OBJ format and cannot exceed 200MB.                  |
| `polygon_type` | STRING    | Yes      | `"triangle"`<br />`"quadrilateral"`   | Surface composition type.                                                                                    |
| `face_level`   | STRING    | Yes      | `"medium"`<br />`"high"`<br />`"low"` | Polygon reduction level.                                                                                     |
| `seed`         | INT       | No       | 0 to 2147483647                       | Seed controls whether the node should re-run; results are non-deterministic regardless of seed. (default: 0) |

**Note:** The `seed` parameter is used to trigger a re-run of the node, but the final output is not guaranteed to be the same for the same seed value.

## Outputs

| Output Name | Data Type | Description                                                             |
| ----------- | --------- | ----------------------------------------------------------------------- |
| `OBJ`       | FILE3D    | The processed 3D model with optimized topology, returned in OBJ format. |

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