> ## 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.

# MeshSmoothNormals - ComfyUI Built-in Node Documentation

> Compute smooth per-vertex normals for a mesh and attach them.

Compute smooth per-vertex normals for a mesh and attach them. Meshes without normals are shaded flat (per-face) by glTF viewers; this node makes them shade smoothly. With a crease angle below 180, edges sharper than the threshold are kept hard by splitting vertices along them.

## Inputs

| Parameter | Description | Data Type | Required | Range |
| - | - | - | - | - |
| `mesh` | The input mesh to process. | MESH | Yes | - |
| `crease_angle` | Edges whose dihedral angle exceeds this value (degrees) stay hard (vertices are split). 180 = fully smooth; lower preserves sharp edges (e.g. \~30-60 for hard-surface). Default: 180.0. | FLOAT | Yes | 0.0 to 180.0 (step 1.0) |

When `crease_angle` is 180 or higher, the mesh topology is unchanged. When set below 180, vertices are split along hard edges, which may increase the vertex count. When vertices are split, per-vertex data (colors, UVs, and tangents) is duplicated to match the new vertex layout, and the resulting mesh is rebuilt as a variable-size batch.

## Outputs

| Output Name | Description | Data Type |
| - | - | - |
| `mesh` | The input mesh with smooth normal data attached, or with split vertices and normals when a crease angle is set. | MESH |

> 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/MeshSmoothNormals/en.md)

***

**Source fingerprint (SHA-256):** `bbe9c0fba68369d8e9d3fb68e635869233804f3aac458e7c217d94977e77b9be`


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.