Unreal Engine Issues

Anisotropic reflections are not visible in all player views during local multiplayer split screen

When playing in a split screen local multiplayer game the anisotropic reflections differ between players when looking at the same object. It appears as the anisotropic light scatter is not applied ...

UDN : Mutable Trying to Access Invalid UEdGraph Pointer

Hello, We've started seeing a crash within Mutable when it tries to access the source graph in PIE. This only seems to be a problem when running a dedicated server as a separate process. We integra ...

Nanite Instanced Static Meshes lost selection outlines in UE5.5

Nanite ISMs lost selection outlines in UE5.5 Actors having an ISM component which uses a static mesh with nanite do not get a selection outline when selected in the editor. Having Nanite is essentia ...

Physics Constraint Component loss of accuracy

Physics Constraint Component has lost accuracy between Unreal versions 5.2 and 5.4 (and up). When measuring the exact distance between rigid bodies constrained by a Physics Constraint Component, the ...

Crash in AWorldDataLayers::InitializeDataLayerRuntimeStates() when quickly unloading then loading a sub-world partition

From licensee: Since we integrated 5.5, we are experiencing a crash in AWorldDataLayers::InitializeDataLayerRuntimeStates() on this line check(ActiveDataLayerNames.IsEmpty() && LoadedDataLayerN ...

UMG SetAnimationCurrentTime no longer works

Autobrake feature in ChaosVehicleMovementComponent is stopping vehicle from sleeping

In ChaosVehicleMovementComponent::CalcThrottleBrakeInput, autobrake is set when a vehicle is stopped - this means that when the car is virtually stationary, the BrakeOut inout parameter is always 1. ...

[bug] OIT doesn't work correctly with alpha composite blend mode

When using OIT, AlphaComposite Materials blend as if they are using the Translucent BlendMode. The order of macro #if … #elif cases cause AlphaComposite Materials to take the same route as Transluce ...

AllowAsyncRenderThreadUpdatesEditorGameWorld/AllowAsyncRenderThreadUpdatesEditor CVars are off by default and unsafe in Niagara

This user made a github pull request: [Link Removed] but it was auto rejected. I think that we can consider taking their fixes, but keeping it disabled by default. ...

Interchange static mesh import convert to reimport and fail to assign material changes.

Hello, When reimporting an FBX using interchange, the material are reapplied and we are stuck with the old properties. We are calling interchange by code, but we were able to repro by doing a reimp ...