Unreal Engine Issues
Unreal Engine Issues
Swapping the Child Actor Class of a ChildActorComponent back to a previously selected BP leads to an Editor crash from illegal Renaming
UE - Framework - Components - Sep 11, 2024A fatal error occurs if we change a Child Actor Class from one BP (ex. "BP_A") to a different BP ( ex. "BP_B") and later change it back to the first BP (ex. "BP_A") without compiling the BP between ...
Actor Dropped at Wrong Location During PIE
UE - Editor - Applied Usability - Apr 3, 2025When attempting to drag and drop an actor from the Content Browser into the level viewport during PIE, the actor is not placed at the mouse cursor location if the Player Controller is attached. Inst ...
Chaos Vehicle does not make them CCD
UE - Simulation - Physics - Jan 10, 2024AWheeledVehiclePawn class tries to use CCD in the constructor, but Mesh->BodyInstance.bUseCCD = true this code does not work to activate CCD because Physics Assets could not be available at this ...
Default Data Wire Thickness in the Editor Preferences only affects Single Value data wires. Containers (Array, Set, Map) line thickness are wrongly tied to Default Execution Wire Thickness.
UE - Gameplay - Blueprint Editor - Aug 19, 2024Changing the "Editor Preferences > Content Editors > Graph Editors > Tracing > Default Data Wire Thickness" value in the "Editor Preferences" only affects single value data wires. Containers (Array, ...
MemReport does not seem to respect mesh streaming
UE - Rendering Architecture - Aug 6, 2024The function "FStaticMeshLODResources::GetResourceSizeEx(...)" does not take into account that the buffers might be emptied, due to Mesh Streaming. This causes "obj list" to report sizes larger than ...
Enabling bUpdateComponentTransformToRootBone in a GeometryCollectionComponent causes broken particles to appear in the wrong location
UE - Simulation - Physics - Destruction - Jun 22, 2025Enabling bUpdateComponentTransformToRootBone in a GeometryCollectionComponent causes broken particles to appear in the wrong location. When that flag is true, the moment the GeometryCollection (GC) ...
When multiple actors are selected, they have different undo behavior in the details panel
UE - Editor - Workflow Systems - Nov 15, 2021When the text in spinbox has focus, it doesn't get the change notification externally. It may also be worth noting that ctrl z or ctrl y also do not get bubbled up to undo the text box values. It a ...
Updating Material does not update platform stats in derived Instance
UE - Rendering Architecture - Materials - Nov 26, 2024It would seem that updating a material does not update the associated platform stats in a material instance editor, only the parameters. Can workaround by manually invoking shader compile in the ma ...
Selected tool using ScriptableTool might get closed when selecting an exposed property.
UE - Graphics Tools - Modeling Tools - May 21, 2024When using a created tool of the ScriptableTool plugin, and setting an InstanceEditable variable, the tool might get close. For this to happen, we need to have a ToolPropertySet attached to the too ...
Editor crashes when using PCG SpawnActor with a DataLayer inside a Level Instance
UE - World Creation - Procedural Tools - Jun 4, 2025A PCG actor is assigned to a DataLayer and placed inside a Level Instance. Then that Level Instance is placed into a World Partition map. When the SpawnActor node in the PCG graph is set to MergePCG ...