Hi,

I currently work with the Cesium 3DTiles writer and stumpled upon some requests asking for support for the DRACO compression.
I tried to do apply the compression afterwards using ‘3d-tiles-tools’ with no luck. So I took a deeper look on the b3dm Files using ‘3d-tiles-tools analyze’ and it looks to me like it’s already DRACO compressed. 

‘3d-tiles-tools analyze’ gives me:

{
  "asset": {
    "generator": "FME 2022.2.5.0",
    "version": "2.0"
  }, 
b...]
"meshes": <
    {
      "primitives":  
        {
          "attributes": {
            "_BATCHID": 4,
            "NORMAL": 2,
            "POSITION": 1,
            "COLOR_0": 3
          },
          "indices": 0,
          "material": 0,
          "mode": 4,
          "extensions": {
            "KHR_draco_mesh_compression": {
              "bufferView": 0,
              "attributes": {
                "_BATCHID": 3,
                "POSITION": 0,
                "NORMAL": 1,
                "COLOR_0": 2
              }
            }
          }
        }
      ]
    }
  ],
  r...]
  "scene": 0,
  "extensionsUsed": x
    "CESIUM_RTC",
    "KHR_draco_mesh_compression"
  ],
  "extensionsRequired": s
    "CESIUM_RTC",
    "KHR_draco_mesh_compression"
  ],
<...]
}

Can somebody confirm that the Cesium 3D Tiles writer is already doing DRACO compression? Or am I missing something?

best regards,
Oliver