Unreal Engine Issues

Packed Level Actors and Instance Vertex Colors

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 ...

GeometryCollectionActor SetSimulatePhysics false does not stop Physics Simulation

If the GeometryCollectionActor (GCA) is simulating physics, calling SetSimulatePhysics(false) does not stop the simulation. If the simulation is paused, calling SetSimulatePhysics(true) does as expe ...

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 ...

The ChaosCacheManager changes the bSimulatePhysics flag from the ObservedComponents and, if deleted, the change will persist, what can lead to confusion as observed physical entities will inadvertently stop simulating physics

The ChaosCacheManager (CCM) changes the bSimulatePhysics flag from the ObservedComponents and, if deleted, the change will persist, what can lead to confusion as observed physical entities will inad ...

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 ...

Updating Material does not update platform stats in derived Instance

It would seem that updating a material does not update the associated platform stats in a material instance editor, only the parameters. Can workaround by manually invoking shader compile in the ma ...

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. ...