Unreal Engine Issues

Level sequence attachment dirtying bugs - 5.4

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. ...

Sparse volume textures displayed in Heterogeneous volume only visible in left eye with instanced stereo enabled

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

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

Nanite displacement on landscapes not rendering on 5700XT

This only happens on a 5700XT, tested this on the 7900XT and the issue did not occur  Initially reported on the Preview 1 forums: https://forums.unrealengine.com/t/unreal-engine-5-4-preview/1763516 ...

Clustering GeometryCollections in sleep state forces them to awake

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

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

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

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

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.

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 ...