> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# BakeNormalMapFromMesh - ComfyUI Built-in Node Documentation

> This node bakes a tangent-space normal map from a high-poly mesh onto a low-poly mesh's UV layout, capturing surface detail that was lost during decimation.

This node bakes a tangent-space normal map from a high-poly mesh onto a low-poly mesh's UV layout, capturing surface detail that was lost during decimation. Connect the UV-unwrapped low-poly mesh and the high-poly mesh it came from, and the node outputs an image ready for the `normal_map` input of Apply Texture To Mesh.

## Inputs

| Parameter          | Description                                                                                                                                                                         | Data Type | Required | Range                     |
| ------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- | -------- | ------------------------- |
| `low_poly`         | The UV-unwrapped low-poly mesh that receives the baked detail. Must have existing UVs; the node never unwraps.                                                                      | MESH      | Yes      | —                         |
| `high_poly`        | The high-poly mesh whose surface detail is baked into the low-poly's UV layout.                                                                                                     | MESH      | Yes      | —                         |
| `resolution`       | Edge length in pixels of the square output normal map (default: 1024).                                                                                                              | INT       | Yes      | 64 to 8192 (step 64)      |
| `cage_distance`    | Surface search band, as a fraction of the bounding box diagonal. Raise for wrong/missing patches under heavy decimation; lower if it grabs across gaps. Default: 0.05.              | FLOAT     | Yes      | 0.001 to 0.5 (step 0.001) |
| `ignore_backfaces` | Skip high-poly surfaces facing away from the texel, so crevices/enclosed spaces don't grab the opposite wall. Disable only if the high-poly winding is inconsistent. Default: true. | BOOLEAN   | Yes      | true / false              |

Note: `low_poly` must have UV coordinates. If it has none, the node raises an error because it bakes onto the existing UV layout and does not unwrap the mesh. When `low_poly` is a batch, each item is baked in order; if `high_poly` contains only one item, that item is reused for every batch item. Empty meshes in the batch are skipped with a warning and produce a flat mid-gray (0.5) normal map.

## Outputs

| Output Name  | Description                                                                                                                                                                                        | Data Type |
| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- |
| `normal_map` | The baked tangent-space normal map (glTF/OpenGL +Y convention) as a square resolution × resolution RGB image with values in \[0,1]. Connect it to the `normal_map` input of Apply Texture To Mesh. | 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/BakeNormalMapFromMesh/en.md)

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