Unreal Engine Issues
Unreal Engine Issues
CreatePatchLibrary is broken
UE - Rendering - Architecture - Shaders - Nov 12, 2025It seems the FEditorShaderCodeArchive.LoadExistingShaderCodeLibrary missed some functions, use FEditorShaderCodeArchive.AddShaderCodeLibraryFromDirectory instead could fix the issue. ...
Megalights support for anisotropic materials
UE - Rendering - Graphics Features - Lumen - Apr 14, 2026A licensee noticed that SUPPORTS_ANISOTROPIC_MATERIALS is not passed to FShadeLightSamplesCS::ModifyCompilationEnvironment for MegaLights ShadeLightSampleCS. Adding it fixes the issue. ...
Behavior tree assets marked dirty when opening in subeditor
UE - AI - Aug 16, 2016Found while I was fixing up other content, that Behavior Tree assets are being marked dirty by just opening them into sub editor. ...
Documentation button redirects to 404 error page in Match3
UE - Platform - Mobile - Aug 23, 2016The documentation button does not redirect to the correct documentation page. Tested on iPhone6S_6240 OS: 9.3.4 ...
Moving or renaming a file in the editor should execute a Perforce move command not a delete+add
Tools - Aug 31, 2016Moving or renaming a file in the editor erases its perforce history. It should execute a move not a delete + add to fix this ...
Hot reload iteration time regression.
UE - Foundation - Core - Oct 19, 2017Hot reload iteration times have been crippled ever since CL# 3332960, which was a fix for [Link Removed]. ...
InstancedStaticMeshes disappear in Shipping builds on mobile when affected by dynamic point lights
UE - Platform - Mobile - Aug 22, 2019This ticket is to add the safe workaround for 4.23.1, with a more optimal fix coming in 4.24. ...
Movement broken for Top Down template for Clients
Docs - Samples - Jan 7, 2015There is no way to control the player after creating a new top down project (blueprint or code). This should be fixed by [Link Removed] ...
Creating BlueprintActor from EmptyActor produces an Actor with multiple DefaultSceneRoots
UE - Gameplay - Blueprint - Jan 24, 2020This does not happen with UE4.22. Maybe related to CL#7462096 and CL#7476283. These are fixes for [Link Removed]. ...
UserDefinedEnum variables in UserDefinedStructs aren't properly updated when the enumerations are reordered.
UE - Gameplay - Feb 4, 2020UserDefinedEnum variables in UserDefinedStructs aren't properly updated when the enumerations are reordered. FEnumEditorUtils::BroadcastChanges fixes up Blueprints but not UserDefinedStructs. ...