Unreal Engine Issues

Incorrect Lumen Scene direct lighting when objects behind masked landscape

When objects are placed behind or beneath a masked landscape and r.Lumen.HardwareRayTracing.SurfaceCacheAlphaMasking is enabled, the direct light evaluation is incorrect. There are two workarounds, ...

Blueprint actors can not be casted until they have been opened after migration or being upgraded to a more recent engine version

This is not a regression tested in //UE5/Release-5.0 CL20979098 After migrating an asset from an older engine version or upgrading a project to newer version Blueprints carried over can not be cast ...

Crash in AWorldDataLayers::InitializeDataLayerRuntimeStates() when quickly unloading then loading a sub-world partition

From licensee: Since we integrated 5.5, we are experiencing a crash in AWorldDataLayers::InitializeDataLayerRuntimeStates() on this line check(ActiveDataLayerNames.IsEmpty() && LoadedDataLayerN ...

GenerateKDopAsSimpleCollision() clamps vertices that are close to the origin which results in inaccurate primitives

When DOP simplified collision is generated for a mesh that has vertices that are close to the origin, part of the function till clamp any values between -0.5 and 0.5 to be 0.5 which will cause the r ...

IOS deviceCrash when input Korean Charactor on EditableTextBox

Linux Native Toolchain depends on libninfo5 which is not bundled

libtinfo.so.5 => /lib/x86_64-linux-gnu/libtinfo.so.5 (0x00007fc27cf4d000) bschaefer@bschaefer-Precision-T7600:bin$ ldd ./clang linux-vdso.so.1 => (0x00007ffceefe3000) libpthread.so.0 => /lib/ ...

Merge Actors (Simplify) is broken with Substrate Shader Models Node

Substrate Materials cannot be baked when Meshes are merged using the "Simplify" method. All textures except for the normal are reduced to a single black parameter. The normal texture produced does n ...

Enabling Strip Source Data On Cook on Geometry Collection is also stripping the Anchor flag of cooked assets

Enabling Strip Source Data On Cook on Geometry Collection (GC) is also stripping the Anchor flag of cooked assets. The licensee has reported that once they do a build the Anchors disappear and GCs t ...

FString.Mid doesn't react appropriately when given negative values for the Count variable

If you use a 5 character string (hello) to call the Mid function and provide 0 for start, -1 for count, it'll give you the entire string. This should either return an assert or treat all negatives a ...

Calling r.DistanceFieldAO command does not work in Shipping Game

Calling the r.DistanceFieldAO command does not work in Shipping Game. It is being called from inside the level blueprint with the "Execute Console Command" node. In the example projects I have it ...