FRootMotionMovementParams::Accumulate can trigger an exception in debug-editor when using a cached pose

Anim - Animation - Jan 11, 2018

When you are using the editor compiled as debug-editor, combining the use of a pose cache, RootMotion Everything setting, could trigger an exception. ...

Breakpoint triggered in Visual Studio after running "{,,UE4Editor-Core}::PrintScriptCallstack()" command

Gameplay - Blueprint - Jan 10, 2018

Running the command {,,UE4Editor-Core}::PrintScriptCallstack() in the Immediate Window in Visual Studio while debugging is paused in Visual Studio will result in a breakpoint being hit when the ...

Blueprint nativization fail with UE4.18

Gameplay - Blueprint - Jan 10, 2018

Switching the Blueprint Nativization mode to inclusive along with un-checking Event Driven Loader will result in an error when trying to package the project. ...

Landscape cooking takes as much as 6 times longer in 4.18

Tools - Landscape - Jan 10, 2018

Some developers are finding that the change to add a bunch of shader types to FLandscapeMaterialResource::GetExcludedShaderTypes() in 4.18.2 increased their project cooking times on PC or console by ...

Project fails to build for iOS from Windows when Generate .uedebugsymbols is enabled

Platform - Mobile - Jan 9, 2018

This does not occur in 4.18.3 at CL 3823254UATHelper: Packaging (iOS): ERROR: System.IO.DirectoryNotFoundException: Could not find a part of the path 'D:\Epic Games\UE_4.19\Engine\Binaries\ThirdPa ...

When deleting a Struct Variable and undoing it, it removes all rows from related Datatables

Gameplay - Jan 8, 2018

When undoing variables in a Structure it clears the referenced Datatable of all its rows. However deleting and just adding a new variable works fine. Repeated undos have the chance to add back the ...

[CrashReport] FDeferredShadingSceneRenderer::ShouldPrepareDistanceFieldScene()

Rendering - Jan 4, 2018

Sent in the unattended mode ...

Applying Clothing Data Causes Mesh Vertex Color to Turn Black (or crash)

Anim - Jan 3, 2018

-When a clothing asset is applied to the mesh, the vertex color(s) change to solid black -Can be removed by right click Remove Clothing Data -Crashes in Main-4.20 -Can't be tested in 4.17.2 due t ...

Crash when syncing a folder with source control that contains a level that utilizes Level Streaming

Tools - Dec 28, 2017

A crash occurs when you attempt to run the sync command on a folder that contains a level that is using level streaming in the editor. This was tested with Perforce and Subversion. Have not tested ...

Crash when selecting ResizeMode "Invalid" of ChangeComponentSize on LandScapeEditor.

Tools - Landscape - Dec 21, 2017

check(0) is used in UpdateComponentCount () of LandscapeEditorObject.h. This looks like an intentional check, but there is a possibility that the user may mistakenly select it. ...