Unreal Engine Issues
Unreal Engine Issues
CreateDynamicMaterialInstance will pull from the base rather than overridden mesh on SkinnedMeshComponent when run from construction script
UE - Framework - Blueprint - Feb 6, 2025When UPrimitiveComponent::CreateDynamicMaterialInstance is called on a skinned mesh, and the input material is invalid, we call USkinnedMeshComponent::GetMaterial to get the base material on the exi ...
Edge Screen Artifacts when calling Widget Blueprints to the Viewport and toggling Fullscreen Mode
UE - Editor - UI Systems - Apr 6, 2016Widgets called to the Viewport with Fullscreen enabled, will eventually cause artifacts to appear on the edges/borders of the screen. There is currently a forums post with multiple users reporting ...
Stationary Directional Lights not Rendering Dynamic Shadows on Mobile
UE - Platform - Mobile - Jan 21, 2016As the title suggests, dynamic shadows on mobile when using a stationary directional light are not appearing at all when deployed to the device or when viewed in the mobile previewer. The odd part ...
[CrashReport] UE4Editor_Core!TArray<wchar_t,FDefaultAllocator>::operator=() [array.h:396]
Tools - Nov 21, 2017This is a common crash coming out of the 4.18 release. Users have not provided any descriptions of their actions when the crash occurred. The callstack seems to be the same as [Link Removed], which ...
SetNiagaraStaticMeshComponent in UNiagaraFunctionLibrary does not add NiagaraVariable to InstanceParameterOverrides
UE - Niagara - Jan 13, 2023The result of the Set Niagara Static Mesh Component (OverrideSystemUserVariableStaticMeshComponent) function provided by the UNiagaraFunctionLibrary is different from the operation result on the det ...
Camera View Transformations in Editor and Sequencer Cannot Be Undo (Ctrl+Z)
zComponent - Archive - May 26, 2025Camera View Transformations in Editor and Sequencer Cannot Be Undo (Ctrl+Z) Description: When switching the viewport to a specific camera actor, any manual movement/rotation of the camera (via ...
When Sequencer's Add Filter Menu>Keyed(U) is enabled, adding a Key to an actor that previously failed the Filter (had zero Keys) does not immediately include the Keyed actor in the filtered list (if fails FSequencerTrackFilter_Keyed::PassesFilter)
zComponent - Archive - Jun 25, 2025When Sequencer's Add Filter Menu>Keyed(U) is enabled, adding a Key to an actor that previously failed the Filter (had zero Keys) does not immediately include the Keyed actor in the filtered list (if ...
DataAsset blueprints have the wrong NativeClass
UE - Gameplay - Nov 18, 2025UDataAsset's constructor assumes itself to be the native class, and caches that value for use by the asset registry. However, if the data asset type is defined in a blueprint (i.e. subclassing UPrim ...
Instanced Actors: Editor preview don't show correct relative mesh transforms
UE - Engine Scaling - Mass - May 30, 2026Context Actors can be converted into Instanced Actors via the IA plugin. During runtime and in the editor, an instanced actor’s visual is generated from the collection of StaticMeshComponents on th ...
Setting a component to replicate in an Actor that is already set to replicate alters the location of the mesh on the Client after enabling physics
UE - Networking - Jan 27, 2016Setting a component to replicate in an Actor that is already set to replicate alters the location on the Client after enabling physics. Note this only appears to occur with components added in Const ...