Unreal Engine Issues
Unreal Engine Issues
Crash when rendering cinematic in a Separate Process without "-NoLoadingScreen" cmd argument
UE - Anim - Sequencer - Jul 5, 2016Crash when rendering cinematic in a Separate Process without "-NoLoadingScreen" cmd argument. Occurs in 4.12 and 4.13 in both Matinee and Sequencer Error message: Assertion failed: SizeX > 0 && S ...
Rarely, unmodified Niagara will cause diffs and bloat the patch.
UE - Rendering - Architecture - Niagara - May 3, 2022Attached is a project that picks up Niagara from the content sample. The probability of reproduction is about 1/10. The simpler the project, the lower the reproduction probability. I am attaching ...
FBX export from UE4 with multiple materials the UV is corrupted
Tools - Apr 18, 2016When exporting a Static Mesh from within UE4 that has multiple materials, some of the material IDs will be condensed into a single ID which will mess up how the material assignment for that part of ...
Material Editor Viewport does not display World Position Offset
UE - Rendering - Features - Mar 19, 2026The preview Viewport in the Material Editor does not correctly render World Position Offset. It appears that the RenderVelocities pass (which is also drawing the depth for the preview sphere) does ...
When very far out from the map origin, large static mesh is not streaming in until player is close in world partition even though it's within loading range.
UE - Engine Scaling - Streaming - World Partition - May 7, 2025Context World Partition has a distance-based level streaming system that provides a complete solution for large world management. Problem The problem is that when the player and large static mesh a ...
Enabling Shader compilation via XGE for 4.18 Editor downloaded from Launcher doesn't work, prevents shaders from compiling at all, editor from loading in some cases
UE - Foundation - Build - Rocket (Installed Engine) - Nov 9, 2017If you enable Shader compilation via XGE by setting r.XGEShaderCompile = 1 in ConsoleVariables.ini in 4.18 Editor downloaded from Launcher, it prevents shaders from compiling at all, and as a result ...
Attenuation Overrides Reset for Spatialize on Sound Cues after Upgrading to Newer Engine Version
UE - Audio - Nov 17, 2016A user on the AnswerHub has reported that a number of his sounds have had their Attenuation Override settings reset, more specifically the 'Spatialize' setting. I ran a few tests and discovered tha ...
Crash when spawning multiple HISM at runtime in a packaged shipping build
UE - World Creation - Worldbuilding Tools - HLOD - Feb 25, 2021When adding multiple Hierarchical Instanced Static Meshes on a loop and packaging the project in Shipping configuration the application crashes due to LowLevelFatalError [Link Removed] [Line: 1431] ...
Opening a DataTable that is set to a Struct that is using a Key variable will crash the editor
Tools - Nov 3, 2015Opening a DataTable that is set to a Struct that is using a Key variable will crash the editor User Description: I'm getting this crash when using Key variable in DataTable. I was able to repro i ...
Android compile failure with GearVR
UE - Platform - XR - Jul 11, 2017Compiling failure from several compile errors in the output log. They're of same type like this:UATHelper: Packaging (Android (ETC2)): xgConsole: In file included from D:\Streams\UE4_Release\Engine\ ...