Unreal Engine Issues
Unreal Engine Issues
Lightmaps on Mobile Devices Appear Dirty and Blurry
UE - Platform - Mobile - Nov 28, 2017When deploying project to a mobile device, the quality of the baked lighting and shadows becomes very poor compared to "Mobile Preview." Lightmaps appear dirty and blurry, with splotches (As shown i ...
[CrashReport] GPUCrash - exiting due to D3D device being lost - D3D Hung - AMD
UE - Graphics Features - May 14, 2019Separating [Link Removed] into Nvidia and AMD tickets.This ticket will house AMD information Exported data on 5/14/2019 with following Query:1 Month Time FrameMajorVersion is 4.22.1Callstack Contai ...
Inconsistent texture loading issue within material editor
UE - Rendering Architecture - Materials - Jul 16, 2025A licensee has reached out via EPS about a texture loading issue they are having in-editor. I summarized the most important points below:The issue relates to texture load failure associated with mat ...
Behavior of configuration file hierarchy is different from document
UE - Foundation - Core - Nov 6, 2015Licensee reported behavior of configuration file hierarchy is different form document here (https://docs.unrealengine.com/latest/INT/Programming/Basics/ConfigurationFiles/index.html) Doc: 1. Engine ...
[CrashReport] UE4Editor_CoreUObject!FPackageName::LongPackageNameToFilename() [packagename.cpp:381]
Tools - Jul 14, 2017This is a common crash affecting users in 4.15 and 4.16. It appears to often occur while editing static meshes. User DescriptionsI was editing a mesh, added a socket, didnt immediately rename it, s ...
Long delay on iOS Device Output Log can cost loss of logging on some devices
UE - Platform - Mobile - Feb 8, 2019If the delay to begin printing the log to the window is too long, some of the logging can be thrown out. This issue does not occur with Android Device Output log UPDATE1: The last time I reproduce ...
Insufficient precision of Decode71 function
UE - Rendering Architecture - Shaders - Jun 5, 2025Encode71 and Decode71 in DeferredShadingCommon.ush are functions that convert 8-bit values to 7-bit values and mask values, and licensees have reported that the accuracy is insufficient when usi ...
[CrashReport] UE4Editor_UnrealEd!PackageTools::ReloadPackages() [packagetools.cpp:576]
Tools - Jun 29, 2017This is a common crash affecting users on 4.16. Users have not provided any descriptions, so additional information is currently unavailable. Source Context 561 ::SortPackagesForReload( ...
Native variable references like GameplayAttribute cannot be searched by "Find in Blueprints" or "Asset Search"
UE - Framework - Blueprint Editor - Jan 4, 2023"Find in Blueprints" does not turn up results when searching a GameplayAttribute by name, even when there is a GameplayEffect blueprint that has a modifier for that GameplayAttribute. This is becau ...
UNetDriver server-side hitch results in ActorInfo->NextUpdateTime far into future
UE - Networking - Feb 16, 2024A high UWorld::Tick DeltaSeconds (i.e. GameThread hitch) results in a high UNetDriver::TickFlush DeltaSeconds. This DeltaSeconds can high (many seconds) if the hitch is long. This value then affects ...