Crash when dragging and dropping sub-level Actors into HLOD Outliner

UE - LD & Art - World Building - HLOD - Aug 25, 2022

In 4.27.2 a new cluster is created without any problem. ...

Crash in FMaterialUtilities::CreateFlattenMaterialInstance when building Simplified HLOD layer

UE - LD & Art - World Building - HLOD - Aug 17, 2022

From licensee: The issue here starts in FVoxelizeMeshMerging::ProxyLOD() where the FlattenMaterial created using FMaterialUtilities::CreateFlattenMaterialWithSettings() returns an empty struct. I d ...

[Merge Actor] Lightmap UVs are broken after merging meshes

UE - LD & Art - World Building - HLOD - Jul 11, 2022

This issue occurs when merging static meshes that have multiple LODs. If they are using UV1 for lightmap index, after merging, the UV1 of the result for each LODs will all be differents, making the ...

When StaticMeshComponent is added to an empty Actor, no HLOD is generated.

UE - LD & Art - World Building - HLOD - Jul 1, 2022

When a Cube of StaticMeshActor is placed, it is generated without any problem. ...

Hierarchical LOD meshes are not frustum/occlusion culled

UE - LD & Art - World Building - HLOD - Jun 24, 2022

Hierarchical LOD meshes are not frustum/occlusion culled ...

HLOD build fails depending on the value of Loading Range in the World Settings

UE - LD & Art - World Building - HLOD - Jun 14, 2022

HLOD actors are generated on the outliner, but no geometry is generated. An error occurs in the output log. ...

HLOD build crashes when GroupActor is present

UE - LD & Art - World Building - HLOD - May 24, 2022

The licensee shared information that a Null check on the following Actor can be used as a workaround. static TArray<UActorComponent*> GatherHLODRelevantComponents(const TArray<AActor*>& InSourceAct ...

HLOD dialog is reporting a fatal error while trying to build HLODs

UE - LD & Art - World Building - HLOD - May 11, 2022

Does not reproduce in //UE5/Main CL 20075312 HLOD dialog is reporting a fatal error while trying to build HLODs in a level with a particular blueprint the user created. HLODs build with out the blu ...

Custom data update crash - invalid memory when removing an instance from a UHierarchicalInstancedStaticMeshComponent

UE - LD & Art - World Building - HLOD - May 3, 2022

This is a race condition, did not crash with -onethread. Attached the collected threaded callstacks, although they look misaligned. Licensee has provided a suggested fix. ...