Unreal Engine Issues

SkyLight Leaking does not affect reflections when the SkyLight is static but static lighting is disallowed

Reflections do not receive SkyLight leakage contribution from a static SkyLight when static lighting is disallowed. This is caused by the function UpdateSkyIrradianceGpuBuffer checking if the SkyLig ...

Can Ever Affect Navigation does not detect updates to collision settings at runtime

When a mesh has its collision updated during runtime the navigation around the mesh does not update. Workaround: If the mesh is set to simulate physics then updates to its collision will update nav ...

Investigate crash reported with 4.16 on Sony Xperia Z3 running Marshmallow

A user has reported a crash that is occurring on his Sony Xperia Z3, https://answers.unrealengine.com/questions/667998/4161-dev-build-app-crashes-on-start-unfortunately.html The user has attached ...

Compiling with VS2019 16.6 later causes garbled characters in output window

Using old behavior by applying true to NMakeUseOemCodePage property solves this issue.  in VCProject.cs​// Project globals (project GUID, project type, SCC bindings, etc) { VCProjectFi ...

4.16.1 Android Development builds crash on start with "unfortunately [App] has stopped"

[CrashReport] Fatal error: Cast of nullptr to Actor failed - UE4Editor_CoreUObject!CastLogError()

This is a common crash affecting users in 4.16, and has been occurring since at least 4.14. It has affected more than 400 unique users, unfortunately they have provided little information. User Des ...

SetActorEnableCollision does not affect Destructible meshes

Setting the SetActorEnableCollision blueprint node to false does not disable collision for a destructible mesh. Workaround: Adding a static Mesh component and setting any mesh will cause the collis ...

SkyLight is not affecting the volumetric fog

Looks like this behavior was working as expected until 5.1 Preview 2 ...

[CrashReport] UE4Editor-Engine!UpdateWorldBoneTM(TArray<FAssetWorldBoneTM,TMemStackAllocator<16> > &,TArray<FTransform,FDefaultAllocator> const &,int,USkeletalMeshComponent *,FTransform const &,FVector const &) [PhysAnim.cpp:143]

Generated from CrashReporter ...

[CrashReport] UE4Editor_CoreUObject!TFastReferenceCollector<1,FGCReferenceProcessor<1>,FGCCollector<1>,FGCArrayPool,0>::ProcessObjectArray()

This is a common crash affecting users in 4.16. Over 100 users have been affected, although they have not provided additional information. Source Context 469 TokenStreamIndex++; 47 ...