Draco-compressed glTF with external .bin fails in Cesium for Unreal while GLB works (same tool, same model)

Cesium for Unreal
9

Hi @kongyf,

I tried your models in Cesium for Unreal v2.22.1, and they seem to be working just fine there. The only thing I had to change was that the tileset.json in the gltf-pipline/draco-gltf directory was accidentally referencing a_draco.glb instead of a_draco.gltf. Other than that, both the transform and pipeline versions of the draco-gltf model are loading and displaying well for me in Cesium for Unreal.

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We definitely had a bug with Draco-compressed external buffers, which should have been fixed in v2.21.0. You said that’s the version you’re using, so it’s not obvious to me why you’d still be having trouble. I think there are two things worth trying:

  1. Double-check that you’re on the official v2.21.0 release (or later).
  2. Even if you are, try v2.22.1 and see if that works better for you.

Thanks for the initial investigations on this @Marco13!