accessor.bufferView is not a required property

[Clockwork-Muse]

The gltf spec says that accessor.bufferView is not a required property ("init as zeros"), but the converter acts as if this property is required.

While Blender seems to output this in most cases regardless, other tools are not as nice, especially when it comes to .glb files, or files using draco mess compression.

[el-dee]

Do you have a file lacking a bufferView that you can share here ?

[Clockwork-Muse]

Khronos sample model

[el-dee]

If I understand the specification correctly, accessor.bufferViewer is indeed not a required property, but "When it's omitted, the sparse accessor is initialized as an array of zeros of size (size of the accessor element) * (accessor.count) bytes."

sparse or an extension is therefore needed to replace those zeros with meaningful values. (sparse will offset some of those zeros using the indices and values buffers)

In case of Draco compression, the actual data will be provided to the accessors after Draco decompression.

So, actually what is missing is sparse and Draco support

[MikelAyani]

I am having the same issue with some glb files, I guess it is because the lack of Draco compatibility. Any plans to implement it? I would like to help anyway.