Unreal Engine Issues
Unreal Engine Issues
ChaosCacheManager is not recording the Observed GeometryCollections NotifyBreak states between level loading and will default to false if changed from Record to Play
UE - Simulation - Physics - Mar 28, 2025ChaosCacheManager (CCM) is not recording the Observed GeometryCollections (GC) NotifyBreak states between level loading and will default to false if changed from Record to Play. AChaosCacheManager ...
ChaosCacheManager is not reproducing Collision Events the second time you Record and Play
UE - Simulation - Physics - Mar 28, 2025ChaosCacheManager (CCM) is not reproducing Collision events the second time (and onwards) we record a Geometry Collection (GC) breaking session. Particles set to track Collision Events correctly fol ...
Deadlock in UPhysicalAnimationComponent::UpdatePhysicsEngineImp
UE - Simulation - Physics - Sep 13, 2023Deadlock in Chaos during PIE; the main thread is in USkeletalMeshComponent::HandleExistingParallelEvaluationTask waiting for a task to complete, and a worker thread is running that task and is in US ...
Niagara Scalability Crash When Processing Significance
UE - Niagara - Jun 4, 2025Method FNiagaraScalabilityManager::ProcessSignificance() iterates on indices from Context.SignificanceIndices and uses them to access the State and ManagedComponents arrays. It can then decide to cr ...
[Feature Request] CVars for HISMC
UE - World Creation - Worldbuilding Tools - Foliage - Jun 18, 2021Currently some (if not all or most) foliage CVars affect both foliage and HISMC. It would be nice to split this so that users can change the values of one without affecting the other. ...
Force Feedback has incorrect duration on iOS devices
UE - Platform - Apple - Sep 16, 2024The user also describes not being able to tell the difference between a force feedback value of 0.3 and 1,0 on iPhones Note: This is likely an issue somewhere in FIOSInputInterface::SetForceFeedb ...
Decals Normal only + Material Attributes
UE - Graphics Features - Mar 24, 2023This does not just work with BaseColor, you can affect any of the outputs by connecting something to a disconnected CreateMaterialAttributes. ...
Applied external forces to vehicles may be nullified by sleeping
UE - Simulation - Physics - Solver - Jan 12, 2024If Entering sleeping state and applying external force are same time, the external force is nullified and the vehicle stops immediately. p.Chaos.Solver.SleepEnabled 0 or __ setting SleepLinearVel ...
ApplyAnimationCurvesToComponent doesn't propagate everything to slaves
UE - Anim - Rigging - Aug 20, 2019In USkeletalMeshComponent::ApplyAnimationCurvesToComponent, while InMaterialParameterCurves and InAnimationMorphCurves are independent of one another, if either of them is empty neither is passed on ...
Objects without custom delta properties can return false for CanSkipUpdate with net.PushModelSkipUndirtiedReplication enabled
UE - Networking - Jun 5, 2023This seems to occur after receiving a Nak for certain actors. FObjectReplicator::ReceivedNak will decrement SendingRepState.CustomDeltaChangeIndex even if the object has no custom delta properties. ...