Unreal Engine Issues
Unreal Engine Issues
Crash when destroying two components in a specific order in this user's project
UE - Gameplay - Blueprint - Oct 6, 2015Crash when destroying two components in a specific order in this user's project. The crash occurs under two circumstances inside the LogActor Blueprint: either DestroyLogPart is called for both Te ...
Live Link Face does NOT launch Take Recorder automatically if press red Record button
UE - Virtual Production - IO - LiveLink - Jul 31, 2020As you can see below, users expect to launch Take Recorder from the Live Link Face app, but it doesn't actually work.When you're ready to record a performance, tap the red Record button in the Liv ...
World Condition FWorldConditionQuerySharedDefinition fails to Link in builds in Unreal Engine 5.7
UE - AI - Mar 1, 2026In FWorldConditionQuerySharedDefinition::PostSerialize, if (Ar.IsLoading() && SerializedObject != nullptr) the SerializedObject is currently only used for debug logging within Link() and is not ...
Cannot PIE; Data Table Still Being Edited
Tools - Dec 22, 2015After making some changes to a Data Table, attempting to PIE fails and returns this error message: Cannot Play In Editor When Performing Edit MemberVar_1 operation. This occurs after closing and sav ...
Clearcoat material behaves differently between 5.5 and 5.7
UE - Rendering - Graphics Features - Jan 16, 2026Starting with Unreal Engine 5.7, specular reflections on clearcoat Materials are less pronounced. Unreal Engine 5.5 tests performed on //UE5/Release-5.5/, CL: 41545209 ...
Curve editor (UMG) prevents Play in Editor if the a drag operation is interrupted with a right click
UE - Anim - Sequencer - Aug 1, 2016Curve editor (UMG) prevents Play in Editor if the a drag operation is interrupted with a right click. The user is given an error that they cannot play in editor while a drag operation is still on go ...
VolumeLightingSamples are not generated correctly
UE - Graphics Features - Lumen - Aug 30, 2019Lightmass.exe SampleVolume.cpp seems to generate VolumeLightingSamples correctly. After that, import processing is performed with Lightmass.cpp ImportVolumeSamples (), but it seems that it is not i ...
Engine build fails due to Unresolved External Symbol error after adding a new global variable to the Engine and then trying to reference it within Engine code
UE - Foundation - Cpp Tools - UnrealBuildTool - Feb 7, 2018Building the Engine in Visual Studio will fail due to an unresolved external symbol error if a new global variable is added to CoreGlobals.h and then referenced elsewhere in the Engine code. The bui ...
Investigate moving morph target mesh work from FSkeletalMeshLODRenderData::InitResources from Runtime Load to DDC/Cook
UE - Graphics Features - Mar 21, 2018See UDN Thread: Possibility for reducing loading times for morph targets by moving work to editor/cooker/ddc (whichever is appropriate) Loading times: Our model has ~70k verts and ~900 morphs – O ...
FARFilter does not exclude classes when told to
Tools - Oct 29, 2018If you look at the static method FilterByFloatRange inside AssetRegistryActor.cpp, you can see that the asset registry filter is set to recursively search paths and classes. It is also set to exclud ...