Level sequence attachment dirtying bugs - 5.4

UE - Anim - Sequencer - Mar 28, 2024

Level Sequences can mark the level they are in as modified without modifying them, as well as get themselves into a state where they modified themselves when saved. ...

GI not coming in with lighting build data when lighting built outside of main scene

UE - Graphics Features - Mar 27, 2024

Volumetric Lightmaps are not shared between Persistent maps that have the same sublevels. Also observed in Release-5.4, CL 32500436 ...

Clustering GeometryCollections in sleep state forces them to awake

UE - Simulation - Physics - Mar 27, 2024

The sleep state will be overwritten in ClusterUnionManager::UpdateAllClusterUnionProperties. Clustering using AClusterUnionActor results the same behavior as well. ...

Network Prediction Insights tool checks/crashes with trace data from a multiplayer PIE session

UE - Gameplay - Network Prediction - Mar 27, 2024

Loading a trace in Insights that has Network Prediction channel data from a multi-client PIE session will hit a check and crash the Insights tool. ...

Niagara using a Volume and Mesh renderer with a shared base material does not renderer correctly

UE - Niagara - Mar 26, 2024

Using a shared base material with both a Volume and Mesh renderer causes the emitter to render as a glowing box at the scale of the bounding box. ...

Camera Shake can apply a new post process material every tick when post process material has "Is Blendable" disabled

UE - Anim - Sequencer - Mar 26, 2024

In the repro project the player camera has a post process material that slightly darkens the frame by subtracting 0.01 from the final color. When a camera animation based on a camera sequence is pla ...

Material Layers Ignore Virtual Texture Sampler Restrictions

UE - Rendering Architecture - Mar 25, 2024

Virtual Textures can be assigned to Texture Sample Parameters that are not configured for Virtual Textures, if that parameter is inside of a Material Layer. Also found in Release-5.4, CL 32426910 ...

Subobject Data Subsystem has CanPasteSubobjects decorated with UFUNCTION but PasteSubobjects is not.

UE - Gameplay - Mar 25, 2024

In the Subobject Data Subsystem, CanPasteSubobjects is BlueprintCallable, but the call to PasteSubobjects is not. Given CanCopySubobjects and CopySubobjects are both BlueprintCallable, the ability t ...

Assert triggering when trying to copy-paste an empty CurveAtlasRowParameter node in the material editor

UE - Rendering Architecture - Materials - Mar 25, 2024

A check happens when copy/pasting a Curve Atlas Row Parameter Expression that has no value. This behavior also exists on CL 32426910 of Release-5.4. ...

Crash when createing a Landscape and the DisasterRecoveryClient plugin is enabled. In the editor appears as Recovery Hub.

When DistasterRecoveryClient (in editor called RecoveryHub) plugin is added to the project and the user creates a Landscape, a crash occurs. ...