Poor performance when Player Collision view mode active in City Sample

UE - Simulation - Debug Tools - Apr 2, 2024

The Editor become unresponsive and then has very low frame rates after activating the Player Collision view mode in the Small_City_LVL and Large_City_LVL maps in the CitySample project. The curre ...

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. ...

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. ...

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 ...

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. ...

Mac Modern xcode framework link issue

UE - Platform - Apple - Mar 25, 2024

Our client is attempting to use an external framework as a third party within Unreal Engine, and they are encountering issues despite following the standard guidelines for adding the framework. T ...

Typing "Lerp" when dragging off of a vector pin results in "Slerp" being the first context menu hit

UE - Gameplay - Blueprint Editor - Mar 21, 2024

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