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. 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

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​Inputs

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Inputs

Outputs