# When switch the material of Cesium3DTileset and refresh it, Packaged program would crash

**URL:** <https://community.cesium.com/t/when-switch-the-material-of-cesium3dtileset-and-refresh-it-packaged-program-would-crash/38873>\
**Category:** Cesium for Unreal\
**Created:** [February 24, 2025, 3:01pm UTC](https://community.cesium.com/t/when-switch-the-material-of-cesium3dtileset-and-refresh-it-packaged-program-would-crash/38873 "2025-02-24T15:01:55Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Unreal\_Miracle](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/unreal_miracle/32/14000_2.png) [@Unreal\_Miracle](https://community.cesium.com/u/Unreal_Miracle)\
**Post date:** [February 24, 2025, 3:01pm UTC](https://community.cesium.com/t/when-switch-the-material-of-cesium3dtileset-and-refresh-it-packaged-program-would-crash/38873/1 "2025-02-24T15:01:56Z")

</div>

![image](https://global.discourse-cdn.com/cesium/original/3X/d/0/d0e13417828e882f1dbed6f55a333ad559ad54d5.jpeg)

---

<div class="post-metadata">

**Author:** ![Kevin\_Ring](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/kevin_ring/32/2003_2.png) [@Kevin\_Ring](https://community.cesium.com/u/Kevin_Ring)\
**Post date:** [February 25, 2025, 5:44am UTC](https://community.cesium.com/t/when-switch-the-material-of-cesium3dtileset-and-refresh-it-packaged-program-would-crash/38873/2 "2025-02-25T05:44:53Z")

</div>

Can you please tell us what version of Unreal Engine and Cesium for Unreal you’re using? The Cesium for Unreal version is found in the lower-right corner of the Cesium panel in the Editor.

---

<div class="post-metadata">

**Author:** ![Unreal\_Miracle](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/unreal_miracle/32/14000_2.png) [@Unreal\_Miracle](https://community.cesium.com/u/Unreal_Miracle)\
**Post date:** [March 7, 2025, 9:15am UTC](https://community.cesium.com/t/when-switch-the-material-of-cesium3dtileset-and-refresh-it-packaged-program-would-crash/38873/3 "2025-03-07T09:15:34Z")

</div>

Sure, UE 5.2.1 and Cesium for Unreal 2.11.0.

---

<div class="post-metadata">

**Author:** ![Kevin\_Ring](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/kevin_ring/32/2003_2.png) [@Kevin\_Ring](https://community.cesium.com/u/Kevin_Ring)\
**Post date:** [March 19, 2025, 8:23am UTC](https://community.cesium.com/t/when-switch-the-material-of-cesium3dtileset-and-refresh-it-packaged-program-would-crash/38873/4 "2025-03-19T08:23:42Z")

</div>

Ok, thanks. That means you’re crashing here:

> <https://github.com/CesiumGS/cesium-unreal/blob/v2.11.0/Source/CesiumRuntime/Private/CesiumGltfComponent.cpp#L3002>

I’m not sure why that might be, though. Are you certain that your custom material is valid at this point? It might help to give us some more details about it, such as how you’re creating and configuring it.