Unreal Engine Issues

Datasmith floods network with UDP traffic in a lab environment

They've had some luck disabling UDP transport as mentioned in the following articles:https://docs.unrealengine.com/5.2/en-US/udp-messaging-settings-in-the-unreal-engine-project-settings/https://foru ...

ULevelEditorDragDropHandler::PreviewDropObjectsAtCoordinates : Should set proper referencer domain when ContentBundle is active

ULevelEditorDragDropHandler::PreviewDropObjectsAtCoordinates sets the World as the ReferencingAsset when we should probably set the GameDataAsset for the current active ContentBundle if there is any ...

Compiling Control Rig can break rig behavior in Sequencer

When working with a Control Rig in Sequencer, compiling the Control Rig used by an actor will cause the rig to no longer drive movement for the actor's skeletal mesh. Licensee provided sample proje ...

Alembic geometry cache not writing data into a virtual texture

Full Body IK does not work properly when root bone has large scale

FBIK becomes extremely unstable when the root bone scale has a value other than 1. ...

Missing shadows when combining CSMCaching and Nanite

A Nanite primitive casting a CSM shadow on another Nanite primitive with "Cast Shadows" disabled, will have it's shadow disappear completely when r.Shadow.CSMCaching = 1. ...

UE4.27.2 Dangling reference and assertion failure in FMaterialShader::GetShaderBindings() in ShaderBaseClasses.cpp

This seems to be a threading issue, as forcing the editor to run single threaded with -onethread makes the assert not reproduce. ...

Extension methods in Rules errors due to ambiguous call

The extension methods seem to be getting compiled into multiple rules dlls Example .Build.cs // In TestPlugin.Build.cs using System; using UnrealBuildTool; publicclass TestPlugin : Module ...

When transferring data from CPU to GPU particles using Array, if CollisionQuery is used simultaneously, the Array cannot be read correctly.

Windows SDKs not recognized for HoloLens Development

This is a regression as the issue does not occur in //UE5/Release-5.1 @ CL 23901901 ...