Attaching multiple raster tiles causes the program to crash. Add an image layer (CesiumTileMapServiceRasterOverlay) under Cesium3DTileset, and then set the corresponding layer name and URL: CesiumIonRasterOverlay → Overlay0 CesiumTileMapServiceRasterOverlay → Overlay1 After setting it up, the pr…

Hi @sjf2046 , welcome to the community! Can you share more information with us so that we can try to reproduce this issue on our machines? What versions of Unreal Engine and Cesium for Unreal are you using? What data are you applying raster overlays to? Cesium World Terrain? Something else? Are yo…

UE5.5 and Cesium 2.13.3 Applying a raster overlay to Cesium world terrain A new material was created as shown in the image to support UDS. [(_D3%E6E607~}~@9%Q$40Q] Strangely, it doesn’t crash when I use either layer alone. The crash only occurs when both layers are added to Cesium World Terrai…

Hi @sjf2046 , I don’t know for sure if it will help, but I think it’s worth trying an upgrade to the latest version (v2.21.0). It’s also worth a try to revert to the default material and see if it still crashes. That’s not a fix, of course, but it might help narrow down the problem.

When I upgraded the plugin to version 2.19.1, the crash issue seemed to be resolved, but a new problem arose: Terrain clipping works correctly during PIE. However, after packaging, unloaded terrain tiles appear outside the clipping area. [image] It keeps happening, and it’s not a network issue.

Hi @sjf2046 , Can you please check the log in your packaged application to see if there are any messages that might offer a hint about what is going wrong there? Also, can I ask why you only upgraded to v2.19.1 instead of all the way to v2.21.0? (as of yesterday, v2.21.1 is out)

There are no related logs, and the same problem occurred after upgrading to v2.21.0. Everything was normal during PIE, but this exception occurred after packaging.

Hi @sjf2046 , I’m having a little trouble following exactly what’s working and what’s not… You originally reported an exception. Actually, it’s an assertion failure, which is interesting because those should only appear in Debug builds of the plugin. Does that mean you’ve built the plugin yourself f…

@Kevin_Ring Hello, I’m using the version downloaded from the store, and I still have the missing tile issue. It appears after packaging. I did use UDS, but I don’t think it’s the cause, because PIE works perfectly. I’ve also tried removing UDS. The bug persists even after I updated the plugin to t…

@Kevin_Ring Hello, was the example I provided helpful? I hope the Cesium team can schedule time to resolve this issue as soon as possible, as it has been bothering me for a long time. Thank you.

Hi @sjf2046 , sorry for the delay. I tried to load your Blueprints, but I see a bunch of compile errors that I’m not sure how to resolve. Perhaps rather than sharing Blueprints, could you provide instructions for recreating the problem, preferably starting with the Cesium for Unreal Samples project? …

Attaching multiple raster tiles causes the program to crash

Cesium for Unreal

sjf2046 February 11, 2026, 1:50am 16

@pjiang9 @Kevin_Ring I wonder if the empty tiles that appear after clipping the terrain are also caused by anomalies?

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Attaching multiple raster tiles causes the program to crash

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