Unreal Engine Issues

Undo Crash with Reroute node into Class pin of SpawnActorFromClass

Crash on undo with SpawnActor node that uses a reroute pin in class wire. "It looks like the variable promotion marks the blueprint as structurally modified, which triggers a skeleton compile, wh ...

Actors in TMap Blueprint Properties are not copied properly for PIE

Actors that reside in TMap blueprint variables refer to the Editor actors not the copied UEDPIE actors (that we'd expect) when accessed in PIE. This is not the case in standalone; this only occurs f ...

CMake include path for generated Sources differs from actual generated Sources location

The CMake project generated by UnrealBuildTool does not specify the (correct) directory for files generated for game classes. This happens when generating the CMake files from within the editor usin ...

Landscape Hole Error in checked PhysX builds

When using checked PhysX builds, landscapes with holes generate errors when they shouldn't. ...

If user set ChunkID to a higher value, UpdateManagementDatabase will be very slow

If user set ChunkID to a high value, the construction process of the database managed by AssetMAnager becomes very long. The cause is the following code in UChunkDependencyInfo :: BuildChunkDepende ...

Instance Static Mesh instance doubles when upgrading from 4.18 to 4.19 or higher

Instance Static Mesh instance doubles when upgrading from 4.18 to 4.19 or higher. According to Licensee, manual check is difficult. ...

The results of Roughness=1.0 from a constant and from a parameter are different on 4.20.

The results of Roughness=1.0 from a constant and from a parameter are different on 4.20. The static bool switch of the following material always returns 1.0. But the results are different.[Link Rem ...

Crash When Substance Material Is Applied to a Mesh In HLOD System

Crash when Substance material is applied to a mesh included in the HLOD system. Working as expected in 4.19 CL# 4033788. Unable to test issue in 4.21 CL# 4339215 due to plugin dependency. Found in ...

Custom node with SceneTextureLookup function doesn't support on Mobile anymore

Unimplemented Simplygon function causes empty mesh LODs and crashes

When we do the refactor for MeshDescription we miss the staticmesh reduction project settings option and change only the quadric reduction. There are two possible fixes for this issue: 1. Implemen ...