Poor Vulkan RHIThread performance in Development builds on some Android

UE - Platform - Mobile - Dec 10, 2024

Community-attempted workaround received in [Link Removed] Correct fix submitted to 5.6 FNMain in [Link Removed] which needs integrating into 5.5.3. ...

Improve performance when creating multiple Data Layer Instances

UE - World Creation - Worldbuilding Tools - Dec 10, 2024

Every time AWorldDataLayers::CreateDataLayer is called,  UDataLayerManager::ResolveActorDescContainersDataLayers() gets called and iterates on all actordescs of the world.When creating multiple data l ...

Geometry Collection (GC) fragments are affecting the Navmesh in wrong positions

UE - Simulation - Physics - Destruction - Dec 6, 2024

Geometry Collection (GC) fragments are affecting the Navmesh in wrong positions and the identified cause is wrong indexing. Once a GC breaks, it's fragments, when big enough, are creating islands in ...

Issue with PLA Editing inside another PLA causes Z-Fighting or Mesh Disappearance.

UE - World Creation - Worldbuilding Tools - Dec 6, 2024

When editing a Packed Level Actor (PLA) that is inside another PLA, z-fighting or mesh disappearance will occur. More specifically, it is seen when duplicating a mesh inside the PLA, upon saving the P ...

r.Lumen.Reflections.DownsampleFactor split screen artifact

UE - Graphics Features - Lumen - Dec 6, 2024

In Split-Screen, with "r.Lumen.Reflections.DownsampleFactor" set to 2, it is possible to have vertical colored artifacts on View 1 (the second view). The Licensee reported the artifact occurred on ...

VR Preview crash when shadow quality is set to low

UE - Platform - XR - Dec 5, 2024

[/Script/Engine.RendererSettings] r.Tonemapper.Sharpen=2 r.TemporalAA.Upsampling=False r.DefaultFeature.AutoExposure.ExtendDefaultLuminanceRange=True r.LightPropagationVolume=0 r.ReflectionCaptureRe ...

GeometryCollection's root proxy doesn't support complex tracing

UE - Simulation - Physics - Destruction - Dec 5, 2024

More details in this thread: [Link Removed] ...

Digital buttons for gamepad thumbsticks and triggers can fire multiple times per-frame in Game Input

UE - Gameplay - Input - Dec 4, 2024

In Game Input, the buttons for different thumbstick and trigger digital events (i.e. RightStickUp, LeftStickUp, LeftStickRight, etc) can actually fire multiple times in a single frame, even though w ...