Blender 4.1 gltf exporter not exporting Vertex Color Attributes with materials but works in blender 4.0 #123925

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Sailor-S · 2024-06-28T22:43:47+02:00

Sailor-S commented

2024-06-28 22:43:47 +02:00

So i tried taking a cube and only adding a vertex color on a single face, then applied a material to the whole cube then exported into a gltf file with vertex attributes selected

Then when i looked at the glb file using windows 3D viewer, it's shows no vertex colors

So i tried taking a cube and only adding a vertex color on a single face, then applied a material to the whole cube then exported into a gltf file with vertex attributes selected <img width="1514" alt="image" src="attachments/2d543bba-fefd-4202-96dc-e26a2779a37b"> Then when i looked at the glb file using windows 3D viewer, it's shows no vertex colors <img width="1355" alt="image" src="attachments/2a40080e-c3a0-4156-be5c-efec22493618">

image.png

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image.png

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Sailor-S added the

labels 2024-06-28 22:43:48 +02:00

Sailor-S commented

2024-06-28 22:47:17 +02:00

Here is the blender 4.1 file if you would like to try it out yourself

gltfExportBug.blend

920 KiB

Julien Duroure commented

2024-06-29 09:08:37 +02:00

In glTF, Vertex Color are multiplier of BaseColor.
Starting Blender 4.1, you can export VC only if you intentionally plugged it in the node tree.

If you are trying to export some custom data, I suggest you to create some custom attribute to export this data.

However, if you want to go against the glTF Specification and export VC without adding the node in material node tree (maybe because you don't care about the material and only want to get the VC data), an option was added in Blender 4.2 beta.
See https://github.com/KhronosGroup/glTF-Blender-IO/pull/2233 for details

Closing this ticket, as there is no bug here, and a workaround is available in 4.2 beta

In glTF, Vertex Color are multiplier of BaseColor. Starting Blender 4.1, you can export VC only if you intentionally plugged it in the node tree. If you are trying to export some custom data, I suggest you to create some custom attribute to export this data. However, if you want to go against the glTF Specification and export VC without adding the node in material node tree (maybe because you don't care about the material and only want to get the VC data), an option was added in Blender 4.2 beta. See https://github.com/KhronosGroup/glTF-Blender-IO/pull/2233 for details Closing this ticket, as there is no bug here, and a workaround is available in 4.2 beta

Julien Duroure closed this issue

2024-06-29 09:08:41 +02:00

Blender Bot added

and removed

labels 2024-06-29 09:08:43 +02:00

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