Unreal Engine Issues
Unreal Engine Issues
A physics actor will still bounce if the Restitution of a Physical Matieral is set to 0
UE - Gameplay - Oct 6, 2016A physics actor will still bounce if the Restitution of a Physical Matieral is set to 0 User Description: Explanation : I am trying to create a Badminton Game for fun and while I was trying to han ...
Mirror Data Table is NOT added SyncMarker automatically when creating
UE - Anim - Runtime - Oct 27, 2022Mirror Data Table is added rows about Bone, Curve, Notify when creating. But SyncMarker is ignored. The following codes can fix this issue. Engine/Source/Runtime/Engine/Private/Animation/MirrorDa ...
PCG: Unable to use Attribute property overrides to target nested struct properties, such as BodyInstance.CollisionProfileName due to how it's validated in PCGMeshSelectorByAttribute.cpp
UE - World Creation - Procedural Tools - PCG Workflow - Jun 17, 2025Context: Static Mesh Spawner is used to spawn one static mesh per point in the provided point data. PCGMeshSelectorByAttribute is used to select an entry based on an attribute present on the mesh. ...
Crash after adding Virtual Bone, then Creating Asset
OLD - Anim - Jul 5, 2017Occurs on? 4.16 - 3466753 - YES 4.17 - 3521650 - YES Error message: Assertion failed: RefBonePose.Num() == NumBones [Link Removed] [Line: 4400] Source Context:4387 ResetAnimation(); 4388 ...
Once an actor channel is closed by NetCullDistance, root motion movement synchronization stops working
UE - Networking - Jul 12, 2021Properties that uses DOREPLIFETIME_ACTIVE_OVERRIDE (ex. RepRootMotion ) will also skip replication when an actor channel is newly opened. This means that if the variables on the server side do not c ...
Editor queries source control for files outside the project or engine
UE - Platform - XR - May 12, 2022When using SVN as SSP, the following warning will be output to the log LogContentStreaming: Texture pool size now 1000 MB LogSourceControl: Attempting "svn status --show-updates --verbose --xml "/ ...
AreaNavModifiers generated by SplineNavModifierComponent have the component-to-world transform incorrectly applied twice
UE - AI - Navigation - Aug 15, 2025USplineNavModifierComponent was made available in UE 5.4. It generates several FAreaNavModifier instances covering a region with a certain thickness around a USplineComponent, and worked correctly u ...
Available network bandwidth is too low for uncapped but slow frame rates
UE - Networking - Sep 24, 2020The networking system has a max frame rate of 120hz by default. Inside UNetConnection::Tick it computes an estimated bandwidth by using that max frame rate, the engine's max frame rate, and the actu ...
Crash in Blueprint when clicking on Component variable name that remains after Component was deleted
UE - Gameplay - Blueprint - Jul 25, 2017This is a common crash in 4.16 and trending in the 4.17 previews. It can be reproduced by clicking on the name of a variable that remains listed in a Blueprint after the associated component has al ...
CPF_TextExportTransient and RF_TextExportTransient inconsistent behavior
UE - Framework - Blueprint - May 23, 2024The TextExportTransient can be specified as a property flag and object flag. Behavior is inconsistent: there are many ways in which an object marked TextExportTransient can still be part of the text ...