The blueprint dynamically loads GeoJSON data but reports a 404 error

[liangyuan1]

What happened?

The above shows my attempt to dynamically load two GeoJSON layer datasets under the Cesium3DTiles actor. Although errors occurred, the data was displayed. There are two issues:

1. Loading GeoJSON data triggers a re-load of the 3DTiles.
2. With both processes running simultaneously, only one layer can be displayed at a time, rather than being overlaid. The error messages are as follows
   错误信息：
   LogCesium: Error: [2025-12-15 14:19:35.039] [error] [ErrorList.h:89] Errors loading GeoJSON document: :

• Status code 404 while requesting Cesium ion vector asset.
  LogCesium: Error: [2025-12-15 14:19:35.039] [error] [RasterOverlay.cpp:127] GeoJSON document failed to load.

Environment

Cesium for Unreal version:2.20.0
Unreal Engine Version:5.6
Operating System: window

Reproduction steps

...

Supporting evidence

No response

[j9liu]

Hi @liangyuan1, sorry for the delay in responding to this!

• Can you tell us which GeoJSON prints the errors? (Maybe run the Blueprint with one GeoJSON at a time)
• You say "only one layer can be displayed at a time", does your Cesium3DTileset have two different CesiumGeoJsonDocumentRasterOverlays? If so, can you make sure the MaterialKey on each one is different?

[j9liu]

I'm going to close this issue due to inactivity, but if this is still a problem, please reopen with the above information. Thanks!