Third person camera lag issue for vehicle in multiplayer

UE - Simulation - Physics - Jun 9, 2023

There's a vehicle/third person camera stutter observed as the vehicle corners. The issue appears worse with Physics Async mode enabled, and less perceptible with this mode disabled. This video was ...

Chaos Vehicles - Wheel physics bounds staying in spawn location on server

UE - Simulation - Physics - Jun 9, 2023

Vehicle wheel shapes on the server appear to detach from the vehicle and remain at their spawn point when running a networked game. The clients physics representation is ok and as expected, i.e. whe ...

Cable Actor becoming stiff when bound to two dynamic objects

UE - Simulation - Physics - Jun 1, 2023

the cable actor does not dynamically deform when the cable actor's parent mesh moves. Instead, the cable actor becomes rigid between the meshes it's bound between. This bug does not occur in the fo ...

GeometryCollectionComponent take +1 frame to be marked as dirty

UE - Simulation - Physics - May 25, 2023

Debugging the code I have been able to verify that in GeometryCollectionComponent.cpp line:2318, the if condition happens every two frames. I think DynamicCollection is not setting all the frames a ...

SetAllBodiesBelowPhysicsDisabled functionality appears to leave bodies behind that raycasts can still interact with.

UE - Simulation - Physics - May 9, 2023

From UDN We use SetAllBodiesBelowPhysicsDisabled() to disable some bodies of our Vehicle. However by drawing the disabled bodies' particles position, we found those particles stay where they disab ...

Cooking crash during shutdown with no useful error

UE - Simulation - Physics - Apr 11, 2023

Sometimes some of actors are destroyed after the destruction of the solver through the garbage collector. In this case, the app crash in FChaosScene::RemoveActorFromAccelerationStructureImp because ...

Cable Actor resets to initial end point position when moving the actor while Attach End is disabled

UE - Simulation - Physics - Apr 4, 2023

This is a regression. Tested in //UE5/Release-5.1 CL23901901 Additionally, I placed the cable actor in a sequencer then keyed several changes in position. The Cable actor had the same behavior of r ...

AStaticMeshActor::CheckForErrors doesn't detect overlapping actors in some circumstances

UE - Simulation - Physics - Mar 14, 2023

Licensee reports that overlapping actors not detected when the static mesh pivot doesn't coincide with actual geometry, e.g. between a character's legs. Maybe should do a bounding box check instead ...

OnComponentHit Event is not triggered when hit by a spawned actor with simulate physics enabled for WheeledVehiclePawn with BoxCollison

UE - Simulation - Physics - Feb 20, 2023

BoxCollison's OnComponentHit event is not triggered when BoxCollison hits a spawned actor with simulate physics enabled. The event is triggered if the same actor has been placed in the level beforeh ...

Typo for Linear Plasticity Type: shirnk instead of shrink

UE - Simulation - Physics - Jan 10, 2023

Regression: Tested in UE5/Release-5.0, this issue also occurs so this is not a regression. ...