MeshSmoothNormals - ComfyUI Built-in Node Documentation - ComfyUI

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

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