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Mesh Bake Maps

Mesh Bake Maps · screenshot coming soon

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What this node does

Mesh Bake Maps projects surface detail from a high-poly source onto a UV-unwrapped low-poly target and writes the result as texture maps packed into the returned GLB. It can bake a tangent-space normal map (glTF/OpenGL +Y) that captures detail lost to decimation, and an ambient-occlusion map packed into the glTF ORM / occlusionTexture. It runs the vendored mesh3d backend (▶ Run). Both inputs are required: the model (the low-poly to bake onto, which must be UV-unwrapped) and high_poly (the pre-decimation mesh that holds the detail). The stage errors if either is missing. A preview of the baked maps becomes the maps image output. This is the classic fix when a GLB round-trip or a decimate loses a normal map: unwrap the low-poly in Mesh Ops, then bake the original high-poly back onto it here. Outputs are ComfyTV snapshots, not native tensors — insert a Bridge to feed native ComfyUI nodes (bridges docs).

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When to use it

  • Restore surface detail after decimating a dense sculpt to a game-ready low-poly.
  • Rebuild a normal map lost in a GLB import/export round-trip.
  • Add baked contact shadows / crevice darkening (AO) to a model that has none.

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Parameters

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bake_normal

Bake a tangent-space normal map (glTF/OpenGL +Y) capturing high-poly detail. Default on.

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bake_ao

Bake an ambient-occlusion map (white = open, dark = crevices), packed into the glTF ORM / occlusionTexture. Default on.

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resolution

Baked map resolution in pixels. Default 1024, range 256–4096 (step 256).

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cage_distance

Normal bake only — the surface search band as a fraction of the bounding-box diagonal. Default 0.05, range 0.001–0.5. Raise it if the bake has missing patches; lower it if it grabs detail across gaps between separate parts.

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ao_samples

AO rays cast per texel. Default 64, range 4–512 (step 4). More = smoother AO, slower bake.

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ao_strength

Scales the occlusion. Default 1.0, range 0–2. Above 1 darkens the AO; below 1 lightens it.

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model

The UV-unwrapped low-poly COMFYTV_MODEL to bake onto. Required.

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high_poly

The high-poly COMFYTV_MODEL that holds the detail — the mesh the low-poly was decimated from. Required.

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Outputs

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Tips

  • The low-poly must have UVs first — run Mesh Ops unwrap before baking, or the maps have nowhere to land.
  • If the normal bake shows holes or bleeds across a seam, tune cage_distance: raise for missing coverage, lower for cross-gap bleed.
  • Grainy AO means too few rays — raise ao_samples. Adjust the overall look with ao_strength rather than re-baking at a higher sample count when you only need it darker/lighter.
  • Mesh Ops — unwrap the low-poly (required first) and decimate it from the high-poly.
  • Mesh Primitive — generate base meshes to build the high-poly from.
  • Mesh Boolean — construct the high-poly detail before baking it down.