GLTFLoader: Unable to load draco compressed model

Description of the problem

The (draco compressed) model 00_07_e-processed_compressed.glb can't be loaded by ThreeJS, it produces the following error in the glTF Viewer:

It is a valid glb file according to the glTF Validator.
The file can be loaded fine in BabylonJS and Cesium previews using glTF Tools plugin for VSCode.

The model can be loaded fine using normal files just fine:

• 00_07_e-processed.gltf
• 00_07_e-processed.glb

The 3D file is originally exported from Unity using UnityGLTF runtime exporter and draco compressed using glTF Pipeline.

Tested in our own application using r91.
Tested with glTF Viewer using r97.
Tested with git clone of glTF Viewer locally, where three.js is replaced with the dev (r98) version.

Three.js version

• Dev (r98)
• r97
• r91 (our current version)

Browser

• All of them (probably, but tested Chrome, Firefox & Safari)
• Chrome
• Firefox
• Safari
• Edge

OS

• All of them (probably, but only tested Windows & MacOS)
• Windows
• macOS
• Linux
• Android
• iOS

[donmccurdy]

I've added the fix for this issue to #15084. With that, the result is:

But I don't see the same yellow coloring in BabylonJS. There are vertex colors in this model... can you confirm this looks correct?

[donmccurdy]

Looking at the uncompressed models, I'm going to assume the yellow vertices shouldn't be there. 🤔

EDIT: Yeah it's a bug, working on a fix.