Unreal Engine Issues

Crash after generating HLODs for approximated meshes that have all triangles culled

The crash occurs when FWorldPartitionHLODUtilities::BuildHLOD attempts to build an approximated mesh that has all of its contents culled during generation, this can happen when an approximated mesh ...

Rendering sequence with livelink data has issues with smooth engine offset

[Link Removed] for reference Playing back a sequence shouldn't have buffered samples. We should have a single one, which was built from the sequence. We need to make sure when played back that it ...

Foliage instances don't move with a static mesh when it is shared between two foliage actors

From Licensee: The bug comes from the call of the function `FoliagePartitioningUtils::Update` in the method `AInstancedFoliageActor::MoveInstancesForMovedComponent`. When the function `FoliageParti ...

Reimporting static mesh doesn't respect changed lightmap settings

Licensee reports change of behaviour between UE4 and UE5 when reimporting a mesh after changing its lightmap build settings. Change of behaviour occurred in 17404767, which was to fix a similar pro ...

CustomPrimitiveData is not updated for Niagara if it's paused on DX12

DumpShaderAsm function fails to load compiler DLL and does not output disassemble code

This is a path specification problem, so if the correct path is given, the DLL will load correctly.static void DumpShaderAsm(FString& String, const D3D12_SHADER_BYTECODE& Shader) { #if D3D12RHI_US ...

FTabManager::FindPotentiallyClosedTab Crash Due to Invalid Array Indexing

As you can see from the above callstack it appears that calling RestoreArea can call FindPotentiallyClosedTab again higher in the stack, which can Remove() an entry from CollapsedDockAreas- this cau ...

GPU crash when using RVT BaseColor/Normal/Roughness format

When using an RVT with BaseColor/Normal/Roughness format on DX12 with a GPU that supports Tier2, a GPU crash may be seen. ...

[Ensure] LoadStreamingLevel and UnloadStreamingLevel are called at the same tick

There is no particular error. Developer can ignore it. ...

Large brush sizes causes hitching in Landscape Sculpt mode

In my case I used the erosion brush and smooth brushes.  Not a regression checked in Version: 5.1.0-23058290+++UE5+Release-5.1 ...