FAnimUpdateRateParameters::GetInterpolationAlpha appears to be returning an invalid value for TrailMode

UE - Anim - Aug 5, 2023

It appears that  FAnimUpdateRateParameters::GetInterpolationAlpha is not returning a sensible value when running in TrailMode.  Currently the only variable in the calculation is EvaluationRate which ...

Crash when creating new projects or converting copies of old ones in Japanese

UE - Editor - UI Systems - Slate - Dec 4, 2014

There's a crash in FCharacterList::GetKerning() when using the editor in Japanese that is apparently fixed in one of these three changelists: CL# 2370014, 2370050, and 2370040 But they were not ...

Blueprint 'Select' node: nodes connect to all input pins are evaluated while only one input is needed

UE - Gameplay - Blueprint - Aug 15, 2015

Originally marked Won't Fix in 2017. Issue reopened on May 1, 2024. All inputs of a Select blueprint node are evaluated, even though in the end only one value is selected. This is wasteful work. ...

Masked Materials have become more expensive to use

UE - Graphics Features - Aug 18, 2016

Masked Materials have become more expensive in 4.13 and internal builds than in 4.12. Images attached for demonstration along with test map using the bush prop from starter content. Tested with ...

tvOS becomes non responsive after killing a launched on app from Mac

UE - Platform - Mobile - Sep 28, 2016

tvOS locks up with the following message being repeated in the device log:Sep 28 10:27:50 Apple-TV-Joey UE4Game[610] <Notice>: [2016.09.28-14.27.50:752][188]LogHttp:Display: Sleeping 0.5s to wait fo ...

Add Font Override Dropdown Acts Unresponsive to Mouseclick

Tools - Oct 4, 2016

When creating a new Sub-Font Family the user should be able to add a font to the Sub-Font by clicking the Add Font Override dropdown. The dropdown would then give the user the Font option. However ...

FBX Scene Importer sets actors in Blueprint to movable when reimporting

UE - Editor - Content Pipeline - Import and Export - Nov 28, 2016

When using the FBX Scene Import into Level with default settings so that the actors in the BP import as static, if you reimport them they will then be set to Movable in the BP. This is not a regre ...

Mesh reduction crash with asset imported using FBX Scene Importer

UE - Graphics Features - Nov 30, 2016

The editor will crash when using Mesh Reduction on an asset imported using the FBX Scene Import options. This same asset will not crash the editor if it has been imported using the normal Import opt ...

'Wait for Movies to Complete' flag is Reversed in Packaged and Standalone Game

Tools - Jan 20, 2017

The 'Wait for Movies to Complete' flag has had its behavior reversed. Previously when you had the flag set to true, it would wait for any intro movies to complete before loading the level. Now it se ...

Main Frame Window grows by 10x10 pixels upon each restart of the Editor

Tools - Feb 17, 2017

With each relaunch of the Editor, the Main Frame Window grows by 10x10 pixels. The editor viewport, in turn, grows by a few pixels in response to that. See attached three images: Window1, Window2, ...