Unreal Editor Freezes and Forces System Restart When Building with Cesium + Screen Space Controls + Night Sky get from github

Cesium for Unreal
1

Hello Cesium Team,

I’m currently working on a project using Unreal Engine 5.5 with the following plugin configurations:

:red_exclamation_mark: Problem Description:

Whenever I build or run the project with these plugins:

  • Unreal Editor starts stacking up background processes,
  • Then freezes completely,
  • And eventually, it forces a system shutdown or restart without any logs being generated.

This crash occurs only when all three components are active together, especially after modifying plugin files.

:repeat_button: Reproducible Scenario:

  1. Use Cesium World Terrain + Night Sky plugin.
  2. Enable Screen Space Controls from Cesium GitHub.
  3. Make small changes in plugin code (like camera input logic or UI tweaks).
  4. Build project or run PIE → Unreal becomes unresponsive and eventually crashes the system.

:white_check_mark: System Specifications:

  • OS: Windows 11 (64-bit)
  • Unreal Engine: 5.5
  • GPU: NVIDIA RTX 4070 Ti Super
  • RAM: 64 GB DDR5
  • Cesium Plugin: v2.16.0 (from GitHub source)
  • Night Sky + Screen Space: Both manually cloned from Cesium’s GitHub.

Any tips to debug this without system crashing before logs are written?
Any suggestions or known fixes will be greatly appreciated. Let me know if you need logs, plugin setup screenshots, or a sample .uproject structure.

Thanks,
Piyush

2

@Piyush_Verma How are you including the screenspace controller in the project? The branch you linked is a branch of Cesium for Unreal, meaning if you’re trying to use a clone of Cesium for Unreal from GitHub alongside a clone of that branch it’ll cause issues (because you’ll have two versions of the same plugin!).

In addition, the “Night Sky” branch you’ve linked is also another branch of Cesium for Unreal, so having that cloned alongside the other two would cause even more problems. Besides that, the branch you’ve linked hasn’t been updated in four years and was never completed. Unfortunately, being such an old version of the plugin (last updated before Unreal 4.27.0 was released, let alone Unreal 5.5), there’s not much we would be able to help you with if you have issues with that branch.

3

Everything was working fine earlier, but now it’s causing issues. The problem started occurring over the past week while building the project. It was running smoothly before that, but recently it’s been giving errors during the build process.