Unreal Engine Issues

Unloaded actors missing when moving WP levels in content browser

Physical Material Mask bug found in GetPhysMatIndex, potentially causing issues with lookup.

On line 408 of UPhysicalMaterialMask::GetPhysMatIndex() in PhysicalMaterialMask.cpp, the AdjustCoord() function is given AddressX for both the U and V coordinates. The AddressY input is never used i ...

Nanite Mesh Reduction Issue

This issue was reported through a UDN. Licensee mentioned that they are seeing a hole in their Nanite mesh at as they move away from it. Using the Nanite debug view we observe at a certain distance ...

The ResavePackages commandlet with -ResaveClass and -IncludeChildClasses doesn't resave unloaded assets

The ResavePackages commandlet can be used to batch resave assets. The ResaveClass and IncludeChildClasses options let one resave all assets of a specific parent class. The problem is that blueprint ...

Landscape / Volume Culling option doesn't work on Simplified HLODs

There are options on both landscapes and HLOD layers that when enabled, performs the  culling of invisible HLOD vertices (parts of HLOD meshes ending up below the terrain).  The option works fine w ...

Editor Performance issue : Loading/unloading multiple Levels / Level Instances triggers each time a call to FActorFolders::RebuildFolderListForWorld

Revisit how FActorFolders are updated when loading/unloading Levels (level instances). The code should maintain the folder list instead of rebuilding everything. ...

ALevelVariantSetsActor not exposing Actor tags

Hi, while trying to workaround this: https://udn.unrealengine.com/s/question/0D54z00008kTgHCCA0/variant-manager-crash-in-upropertyvaluehasvalidresolve I thought I would not create variant sets act ...

Variant manager crash in UPropertyValue::HasValidResolve

in the past we have reported a lot of VM related bugs which got fixed over time. Unfortunately, I think we have another one. Right now we're using 5.0.3 binaries from the launcher. Now the pro ...

Widget Flickering Observed in RetainerBox with Incorrect LayerId

Setting the Phase Count of a RetainerBox to 2 or more may cause other widgets within the same UserWidget to flicker. Upon investigation, we found that during frames where the flickering occurs, the ...

Focus mode in the Editor does not handle Actors without PrimitiveComponent correctly, treating them as if they were at the origin (0,0,0), skewing the camera placement.

Focus mode in the Editor does not handle Actors without PrimitiveComponent correctly, treating them as if they were at the origin (0,0,0), skewing the camera placement. Some Actors like the WorldDat ...