Tiled Landscapes imported with inverted Y axis rotation in World Browser

UE - LD & Modeling - Terrain - Landscape - Feb 23, 2015

When importing tiled landscapes into the world browser, the landscape tiles appear with inverted Y axis rotations. ...

Synced BB keys doesn't work

UE - AI - Feb 26, 2015

It seems there's a bug that in some circumstances AI's BlackboardComponent doesn't get registered for synced keys updates. After a short investigation it turns out that some code got stomped and BB ...

[OPENGL]: Enable Subsurface Scattering

Tools - Jun 29, 2015

Subsurface scattering is disabled on all OpenGL platforms despite the shaders being properly translated & OpenGL platforms supporting the relevant CPU-side APIs. This also affected Metal for the WWD ...

Most variable types that do not reference a specific Actor in the level cannot have defaults set in Structs

UE - Gameplay - Blueprint - Feb 7, 2015

Most variable types that do not reference a specific Actor in the level cannot have defaults set in Structs. While this makes sense for Actor references, I don't see why a Struct couldn't reference ...

Crash Occurs When Duplicating Static Mesh with Foliage Placed on it

UE - World Creation - Worldbuilding Tools - Foliage - Mar 10, 2016

When duplicating an actor that has foliage placed on it (i.e. the table in the basic level with starter content), the editor will crash. Found in 4.11 Preview 7. Reproduced in Main CL 2894512 Thi ...

Drop down menus clip on 27" Screen iMacs

UE - Platform - Apple - Mar 17, 2017

Drop down menus clip on 27" Screen iMacs (See attached images.) Reported from a 27" iMac and tested on a 27" iMac here. Other models may be affected. *Image with Blue circled areas are from the use ...

[CrashReport] Mac crash - FMetalRenderPipelineDesc::CreatePipelineStateForBoundShaderState

UE - Rendering Architecture - RHI - Aug 25, 2017

This is an infrequent Mac crash that has been affecting users since at least 4.15. Users have not provided any descriptions of their actions when the crash occurred. The callstack is similar to the ...

IsTraceHandleValid with default FTraceHandles has unexpected behavior on the first frame

UE - Simulation - Physics - Sep 18, 2018

Because both FWorldAsyncTraceState's CurrentFrame and FTraceHandle are default initialized to 0, on the first frame, if a new Asnc Trace starts all default FTraceHandles will reference the same (now ...

RGB/UINT10 HDR Format not using ST.2084

UE - Rendering Architecture - RHI - Aug 23, 2021

Specification here: [Link Removed] Which is mirrored in engine in FD3D12DynamicRHI::Init (for example): [Image Removed] However, FWindowsPlatformMisc::ChooseHDRDeviceAndColorGamut always returns ...

"Failed to find object 'Class None'" in project log after creation

UE - Foundation - Core - Nov 17, 2014

Users reported seeing the line "LogUObjectGlobals:Warning: Failed to find object 'Class None.'" in the Output log after creating a project. I was able to confirm in a new blank code project without ...