Crash occurs when RayTracing.ExcludeDecals is enabled

UE - Rendering - Lumen - Sep 16, 2020

The cause of the crash is out-of-range access to the array. ExcludeDecals eliminates the mesh instance to which the decal material is assigned, but it seems that the MeshCommand has been registered ...

DrawDebugString display wrong position in PIE when changed display scale

Tools - Sep 16, 2020

The display position of the text in DrawDebugString is affected by the scale of the display. Should refer to the Project() of DebugCanvas (not Canvas). -  Suggest Code void AHUD::DrawDebugTextL ...

Crash occur when switching the Ray Tracing shadow function when only shadow is enabled in the Ray Tracing

UE - Rendering - Lumen - Sep 16, 2020

According to the licensee, this problem is caused by a variable inconsistency in Cvar. The cause seems to be the difference between the CVar reference when generating RayTracingSceneRHI and the CVa ...

Can not output the log that is "Category=LogActor, Verbosity=log"

UE - Gameplay - Sep 16, 2020

The LogActor is set to "CompileTimeVerbosity=Warning", so it cannot output more than the "Warning" level. ENGINE_API DECLARE_LOG_CATEGORY_EXTERN(LogActor, Log, Warning); Suggest the following  ...

Functions containing Unicode characters break nativization on Clang-hosted target platforms.

UE - Gameplay - Blueprint - Sep 15, 2020

The UHT boilerplate code that's generated from a converted Blueprint class header file generated from a Blueprint class containing one or more function names with non-ASCII characters will fail to c ...

Niagara Emitter editor forgets Timeline playback ranges

UE - Niagara - Sep 14, 2020

This seems to only affect an emitter and not a system asset. ...

Item of Console Variables on Device Profiles is displayed incorrectly when Editor setting is other than English

UE - Editor - Workflow Systems - Sep 14, 2020

If the Editor is in English, it will be displayed correctly. ( r.*)[Image Removed] This issue depends on the display language of the Editor and seems to occur in languages other than English. I al ...

ProxyLOD plugin generates uninitialized vertices at end of a vertex buffer

UE - World Creation - Worldbuilding Tools - HLOD - Sep 11, 2020

ProxyLOD::FQuadricMeshSimplifier::OutputMesh may remove duped verts. The input vertex buffer was resized by numVerts from FQuadricMeshSimplifier before calling OutputMesh. So these behaviors genera ...