Unreal Engine Issues
Unreal Engine Issues
Debug symbols are required for the Shipping packaging configuration
Tools - Feb 11, 2016If the engine is installed without the Debug Symbols, packaging for Shipping will fail due to the missing files. While I believe this is expected for Development, it shouldn't occur with shipping. ...
FHLSLMaterialTranslator::GetMaterialEnvironment can crash or not load UMaterialParameterCollections
UE - Rendering Architecture - Materials - Apr 30, 2025In UE 5.5, the Editor may crash in FHLSLMaterialTranslator::GetMaterialEnvironment when loading materials with Material Parameter Collections, likely due to async loading. Calling ParameterCollectio ...
Lyra 5.5 - LAS_ShooterGame_SharedInput has got a missing reference on InputMapping #1
UE - Gameplay - Input - Jan 27, 2025The templated Lyra project for 5.5 is missing a reference to IMC_Default_KBM on /ShooterCore/Experiences/LAS_ShooterGame_SharedInput because it looks like IMC_Default_KBM was renamed to IMC_Default. ...
Blueprint Viewport Not Updating When Destructible Mesh Component is Assigned a Mesh
UE - Simulation - Physics - Destruction - Apr 18, 2016When you add a Destructible Mesh to a Destructible Mesh Component inside of a blueprint, the viewport is not updated with the new mesh. If you add the blueprint to the level and then open the bluepr ...
GoogleARCoreJavaHelper functions are not correctly exported publicly
UE - Platform - XR - Oct 31, 2018The jni functions in GoogleARCoreAndroidHelper.cpp are not correctly exported, when we tried to build a Test project it failed with this exception: java.lang.UnsatisfiedLinkError: No implementatio ...
BuildGraph XML Errors Logged Incorrectly
UE - Foundation - Horde - BuildGraph - Aug 30, 2019Suggested fix from licensee: After investigation, it seems that the filename is passed as a string instead of a FileReference in Script.cs:84. Fixing the issue seems to be as simple as changing th ...
Cloth jitters in Movie Render Queue renders when temporal sampling is enabled
UE - Anim - Sequencer - MRQ - Dec 6, 2022The Cloth simulation time step smoothing is interfering with the substepping fix for multi Temporal Samples by changing the very variable DeltaTime and causing some large errors in the cloth simulat ...
Second player's screen does not render in Split Screen on Android
UE - Platform - Mobile - Mar 21, 2019The second player's screen in a Split Screen multiplayer session on Android does not render. It remains completely black. This was also an issue prior to 4.15 but was fixed with [Link Removed]. The ...
Chaos Cloth: NaNs can be introduced from bad AnimatedPositions/Normals
UE - Simulation - Physics - Character - Aug 17, 2024We've worked out at least a possible way this can occur from using uninitialized AnimatedNormals values when changing LODs. Ensuring all AnimatedNormals are initialized appears to fix the problem. ...
Procedural Sound Wave Fails to Play when returning 0 bytes in GeneratePCMData callback
UE - Audio - Aug 2, 2016Returning 0 bytes in GeneratePCMData results in the procedural sound wave not continuing to play audio. Instead of returning 0, we need to return an empty buffer if the procedural sound wave doesn't ...