RewindDebugger visual artifacts when actor's LOD switches during recording when using MetaHumans

UE - Anim - Gameplay - Mar 28, 2024

Rewind debugger sometimes behaves incorrectly during lod switches. Users have found this on a metahuman. ...

UE5.4 Preview 1 produces rendering artifacts on Landscape with World Position Offset

UE - LD & Modeling - Terrain - Landscape - Mar 28, 2024

A material on a landscape with WPO will cause major ghosting, even if that WPO is a dynamic {0,0,0} ,such as from a black texture. ...

Sampler Source: From Texture Asset with Streamed Virtual Texture

UE - Rendering Architecture - Mar 28, 2024

It appears that Texture Samplers for Virtual Textures do not respect the Tiling Method from the Virtual Texture Asset when the "Sampler Source" is set to "from texture asset". ...

Translucency area has stripe-style issue on TSR

UE - Graphics Features - Mar 28, 2024

The TSR History Rejection buffer develops a grid-like artifact over translucent, camera-facing planes. ...

Outline artefact on cascade shadow transition

UE - Graphics Features - Mar 28, 2024

Some pixels at the edge between cascaded shadow maps and distance field shadows can be skipped by both, leading to unshadowed pixels. Licensee reports the bug happening in 5.3 as well. Test project ...

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. ...