Unreal Engine Issues

Optimize Data Layer runtime state replication

[Link Removed]This issue occurs only when I have a lot of RDLs (I tested 2500 and 1600). I tested with 6 RDLs and had no issuesI also noticed in the server log an error when a lot of RDLs are presen ...

Gameplay Ability Component Montage Replication incorrectly handles cyclic animation sections

In AbilitySystemComponent_Abilities.cpp, the check for the client being on a different section on line 3059 checks that the RepNextSectionID is not the current section. One would assume this is beca ...

Gameplay Cue Notify Paths in Game Feature Modules don’t work when written in the ini file, only when added via AddGameplayCueNotifyPath()

The gameplay cue may work fine the first time. If this is the case, then relaunch the editor. It should then be broken, as the tag is no longer loaded after its creation. ...

Lumen scene view - spot light cut off

This looks to be an issue with shadows in Lumen Direct Lighting, and might be coming from the "Batched lights" pass. ...

Nanite Dynamic Tessellation issue with Material Layers

When a BPActor containing HISMs is multiplied with a scale, LOD display control doesn't work correctly

Workaround 1: 1. Change HierarchicalInstancedStaticMesh.cpp in either of the following ways:void{{ FHierarchicalStaticMeshSceneProxy::GetDynamicMeshElements(const TArray<const FSceneView*>& Views, c ...

Crash Duplicating an empty AtlasRow material node

This isn't a hard crash, but a "verify(...)" from MaterialExpressions.cpp, line 559. ...

Some post-processing passes sample outside of the viewport when using scene capture components

It looks like the SSAO shader does not clamp its sample space to the half view size for the two inputs "Ambient Occlusion" and "AmbientOcclusionSetup", leading to invalid data entering the edge of f ...

Thin translucent doesn't work with separate translucency and Before-DOF

Static Mesh Only enabled Foliage Actor causes serialization error in packaged game

The crash can be worked around by modifying FFoliageISMActor::Serialize as following code : void FFoliageISMActor::Serialize(FArchive& Ar) { #if WITH_EDITORONLY_DATA     if (!Ar.IsCooking()) // ...