Unreal Engine Issues

Volumetric clouds are jagged along mesh edges when Fog Height Falloff is 0

Volumetric clouds are composited against opaque mesh silhouettes at a reduced resolution. A blocky and jagged edge appears along the silhouette. The fog brightness of the clouds also changes abruptl ...

Crash when merging Skeletal Mesh with incomplete LOD streaming

SummaryMerging a Skeletal Mesh whose LOD streaming has not completed crashes with an AccessViolation while the vertex copy reads the Null buffers of LODs that have not been streamed inRoot cause is ...

Issue with UHLODBuilder::ComputeHLODHash

The HLOD content hash used to detect changes and trigger rebuilds effectively ignores everything hashed before the source-component loop — including the result of UHLODBuilderSettings::ComputeHLODHa ...

Water ripples stop occurring during long-distance movement in WaterBody with bEnableLocalOnlyTessellation enabled

BlendSpace Loop Boundary Produces Inconsistent Sync Marker Data andTriggers an AnimSequence Follower Assertion

Summary In UE 5.7.4, when a looping BlendSpace with Match Sync Phases enabled plays as a SyncGroup Leader and crosses its loop boundary during a transition to an external AnimSequenceFollower in th ...

GPU Validation texture barrier errors for SkyAtmosphere component

A licensee reported that two SkyAtmosphere texture resources do not have proper memory transitions added by the RDG. This happens because in VolumetricCloud.usf, these textures are referenced via Vi ...

Viewport Controller Camera Control Regressions in UE5.8

In UE5.8 it appears some changes were made to the camera control and navigation in the editor viewports. You can no longer use controller and mouse simultaneously to control the camera. Previously ...

SetInputMode_GameOnly + windowed mode: Win+Arrow window snapping stops working after dragging window across monitors on multi-display setup

When SetInputMode_GameOnly is applied on a PlayerController and the application runs in windowed mode on a multi-monitor setup, the Windows OS shortcut Win+Arrow (window snapping) stops functioning ...

VSM shadows are missing for non-Nanite meshes in a PPV where Megalights is disabled, but Megalights is enabled in the project

In UE 5.8 r.Visibility.LocalLightPrimitiveInteraction mode 2 (enabled if MegaLights is disabled) was added and made the new default as a performance optimization. However, this causes shadows to d ...

Can't cook a subsequent release when the project uses World Partition.

A licensee reported getting errors when cooking a subsequent release. The bug is a side effect of CL44557776 which changed the behavior when dealing with generated packages in UCookOnTheFlyServer::G ...