ChaosCacheManager is not properly recording the state of each particle when toggling Fields and Anchor Fields in the scene.

UE - Simulation - Physics - Destruction - Oct 22, 2024

ChaosCacheManager is not properly recording the state of each particle when toggling Fields and Anchor Fields in the scene. During my investigations I've noticed that ChaosCacheManager does not reco ...

A GeometryCollection that was broken and is going through shrinking will reset the size of its particles if a second level is broken

UE - Simulation - Physics - Destruction - Oct 18, 2024

Might relate to issue [Link Removed] - "The Remove-On-Break feature, set on Fracture Mode on Geometry Collections, stops shrinking and shows strange behaviors" The added information on this particu ...

The Remove-On-Break feature, set on Fracture Mode on Geometry Collections, stops shrinking and shows strange behaviors

UE - Simulation - Physics - Destruction - Oct 15, 2024

The Remove-On-Break (ROB) feature, set on Fracture Mode on Geometry Collections (GC), was supposed to make the particle shrink until it vanishes. When the GC goes to sleep the shrinking stops and sh ...

Crumbling Geometry Collections do not render for one frame when child clusters crumble

UE - Simulation - Physics - Destruction - Oct 3, 2024

Crumbling Geometry collection do not render for one frame when child clusters crumble. In the repro project a 4 particle GC is told to crumble. The single GeometryCollectionActor is then split into ...

UGeometryCollectionComponent::EventDispatcher gets registered for events twice what can result in duplicate collision events being fired

UE - Simulation - Physics - Destruction - Sep 18, 2024

UGeometryCollectionComponent::EventDispatcher gets registered for events twice, once in UGeometryCollectionComponent::RegisterForEvents() and again in UChaosGameplayEventDispatcher::OnRegister(). Th ...

Using Fracture/Chaos Destruction with TSR as Anti-Aliasing Method generates smeared images.

UE - Simulation - Physics - Destruction - Aug 15, 2024

Using Fracture/Chaos Destruction with TSR as Anti-Aliasing Method generates smeared images whenever the debris are moving. The client pointed out that the issue might come from GeometryCollectionCom ...

Chaos Cache : Event tracks are not saved second or subsequent geometry collection recordings

UE - Simulation - Physics - Destruction - Jul 23, 2024

After the second recording time, the event listener registration in FGeometryCollectionCacheAdapter::InitializeForRecord is skipped. Here is a workaround :// We only need to register event handlers ...

Creating MaterialInstanceDynamic for a moving/crumbled geometry collection component, the rendering position is reset to the initial location

UE - Simulation - Physics - Destruction - Apr 23, 2024

Creating a MID makes the render state dirty and the engine will recreate a new scene proxy without the current attitude. This results in rendering the object in incorrect location. Here is a tempor ...

GeometryCollection with StripOnCook and without EnableNanite causes a crash in cooked game

UE - Simulation - Physics - Destruction - Jun 16, 2023

The Strip on Cook option seems to strip even necessary data. ...

Editor becomes unresponsive/freezes when a Geometry Collection is destroyed by a Hit Event while simulating

UE - Simulation - Physics - Destruction - Apr 19, 2023

This is a regression. Tested in //UE5/Release-5.1 CL23901901 When a geometry collection is destroyed by an On Hit event the editor becomes unresponsive and never recovers. No crash is generated. ...