Unreal Engine Issues
Unreal Engine Issues
Building Packed Level Actors causes references to break in the Packed level Actors' Blueprints
UE - World Creation - Worldbuilding Tools - Level Instances - Oct 27, 2022This is not a regression. Tested in //UE5/Release-5.0 CL 20979098 Building Packed Level Actors causes references to break in the Packed level Actors' Blueprints. Rerunning the Build > Pack Level Ac ...
Starter Content Blueprint_Effect_Explosion Root Componet In Invalid State
UE - Content - Feature Pack - Sep 22, 2023The Blueprint_Effect_Explosion Actor's Root Component in the Starter Content is in some form of invalid state. It reports to have a scale of (1.0, 1.0, 1.0) in the details panel but further behaviou ...
[CrashReport] UE4Editor_Engine!FStaticMeshRenderData::AllocateLODResources() [staticmesh.cpp:775]
UE - Graphics Features - Apr 19, 2018No user comments in crash group 771 void FStaticMeshRenderData::AllocateLODResources(int32 NumLODs) 772 { 773 check(LODResources.Num() == 0); 774 ***** while (LODResour ...
SetGamePaused on EventDestroyed crashes the editor on compile
UE - Gameplay - Blueprint - Apr 1, 2015SetGamePaused on EventDestroyed crashes the editor on compile. Reproduced in 4.7.3 binary and Main (//depot/UE4/Promotable-CL-2496752) Crash Report: [Link Removed] Call Stack: UE4Editor_Engine! U ...
Niagara Ribbon Facing Mode Custom Side Vector does not work correctly
UE - Niagara - Feb 28, 2020The Custom Side Vector facing mode is no different than the Custom facing mode on Niagara ribbons. The linked UDN has more information on a potential cause, as well as a proposed fix. It looks like ...
Normals are wrong on grouped sprites, causing issues when they are using lit materials
UE - Gameplay - Paper2D - Jul 12, 2016The normals for each sprite in a grouped sprite component are always as if the sprites were rotated (0,0,0), which is incorrect. Each sprite should have correct normals and look the same as if it w ...
New C++ Class (actor) fails to build
UE - Foundation - Cpp Tools - Mar 8, 2022While trying to create a C++ actor to test if it can be created with a custom Copyright notice specified in Project Settings, the Live Coding window returns a "Build failed" and error of: "ERROR: U ...
SkyLight makes level entire green on Android devices
UE - Platform - Mobile - Aug 10, 2016https://udn.unrealengine.com/questions/305453/skylight-makes-our-level-entire-green.html Licensee was seeing this only on this device: SM-G906S Android 5.0.1 Adding glFlush call in CaptureSceneToS ...
Multiple templates have Can't Find File warnings when cooking content for Mac
UE - Foundation - Core - Cooker - Jan 13, 2016The following Can't Find File warnings appear for the Flying Code and BP projects when cooking content for Mac.MainFrameActions: Cooking (Mac): UE4Editor: [2016.01.13-20.14.37:469][ 0]LogInit:Displ ...
Sphere Mask ArgInvHardness missing multiplication
UE - Rendering Architecture - Materials - Jun 27, 2025Hi Epic, In MaterialExpressions.cpp UMaterialExpressionSphereMask::Compile(), hardness is not calculated the same way in both <if> conditions. One is missing a multiplication by 0.01f. Specificall ...