GLTFLoader: Error loading .glb from Revit 3D Tiles 1.1 export

[yoyomule]

Description

I exported the Revit file to 3Dtile (3Dtile 1.1 standard, Meshopt compression), which can be loaded normally in Cesium, but in 3Dtilerender it either cannot be loaded or the model loses objects after loading.After communicating with 3DTilesRendererJS（ NASA-AMMOS/3DTilesRendererJS#879 ）, I think it is related to the gltf loader of threejs. I provide the 3Dtile model and hope to get help. Thank you。

Reproduction steps

1.export revit to 3dtile
2.Load in3DTilesRendererJS

Code

// code goes here

Live example

export revit to 3dtile model（3dtlile1.1）
dtz2.zip

Screenshots

Version

r162

Device

Desktop

Browser

Edge

OS

Windows

[donmccurdy]

To @gkjohnson's comment in NASA-AMMOS/3DTilesRendererJS#879, I don't think the official validator understands EXT_meshopt_compression, so it's difficult to say without a closer look whether the data is valid or not. I tested in...

• THREE.GLTFLoader
• glTF Transform
• Babylon
• Playcanvas

... and only Babylon parsed the file without errors, so my guess is something is off with the export, but I'll try to take a closer look and verify that.