Unreal Engine Issues
Unreal Engine Issues
Compile error in ShadowDepthVertexShader.usf if INTERPOLATE_POSITION
UE - Graphics Features - Oct 21, 2015Shader compile error in function PositionOnlyMain() in ShadowDepthVertexShader.usf if defined INTERPOLATE_POSITION. LogShaderCompilers:Warning: 1 Shader compiler errors compiling WorldGridMaterial ...
Undo/Redo can cause the gizmo to desync from a leaf-selected component
UE - Editor - Workflow Systems - Oct 18, 2021This is a regression from 4.27. This is happening because of the change to typed elements. UEditorEngine::PostUndo, when combined with the typed element changes causes the selection set to reorder ...
Editor crashes when changing skeletal mesh if another skeletal mesh component is attached when using master pose node
OLD - Anim - Jan 27, 2020The crash only occurs if the additional skeletal mesh component is used with Set Master Pose Component (see ToggleAttach function in the TopDownCharacter BP). It doesn't seem to matter what mesh we' ...
CitySample - Level MassCrowd - interactions with SmartObjects/ContextualAnimScene is broken in 5.5
UE - AI - Apr 9, 2025The 5.5 version of the CitySample project, particularly the MassCrowd scene, was not properly maintained. The previously working functionality of NPCs being able to sit on a bench is now broken. CAS ...
Assigning a static mesh to a Mutable Clip Mesh With Mesh Node can crash the editor
UE - Anim - Mutable - Jul 4, 2025Context: The Mutable plugin has a modifier node called Clip Mesh With Mesh that allows Static Mesh modifiers to be assigned as the clip mesh. Under certain circumstances, an assert can be triggered ...
Cannot Use Key Value Combo "Alt + F4" for New Action Mapping
UE - Gameplay - Input - Apr 21, 2016You cannot use the key value combo "Alt + F4" as the input for an Action Mapping, whereas you can use "Alt + other F keys" as inputs. (Alt + F4 is a command to close programs in Windows) Expected: ...
Forward Rendering shading flicker on some assets set to Static
UE - Graphics Features - Jan 18, 2017When forward shading is enabled some assets will have a shadow flicker along their face geometry. It has a similar look of z-fighting with polygon faces. This issue does not happen in Deferred rende ...
Unable to access inherited component using Subobject Data Subsystem
UE - Gameplay - Components - Oct 3, 2023When using the Subobject Data Subsystem (Engine\Source\Editor\SubobjectDataInterface\Public\SubobjectDataSubsystem.h), we often have to work with an instance of FSubobjectData (Engine\Source\Editor\ ...
[CrashReport] UE4Editor_Engine!UEdGraphPin::SerializePinArray() [edgraphpin.cpp:1808]
UE - Gameplay - Blueprint - Sep 26, 2018User comment in crash group:I was try to copy the AI MOVE TO(from pawn sensing) node inside a function, i couldnt copy it because it said conflicting node substituted during paste;, so i tried to cu ...
UWorldPartitionSubsystem::IsStreamingCompleted returning the wrong query result when all cells and actors in location are in DataLayers
UE - World Creation - Worldbuilding Tools - World Partition - Jul 24, 2025Context: Data Layers is a system within World Partition used to organize Actors both in the Editor and at runtime. It allows for the user to dynamically load and unload layers in the Editor to help ...