AIPerceptionComponent's DominantSense is not being used

Gameplay - AI - May 25, 2015

It seems there's a bug in AIPerceptionComponent that results in information about dominant sense never getting processed and all derived data doesn't get set. DominantSenseID doesn't get set. ...

Post Processing Does Not Account For Screen-Percentage Quantization

Rendering - Jul 30, 2015

When changing r.ScreenPercentage the final value used for buffer generation is clamped to the nearest 4 pixels to aid in post processing and other steps. During post processing the same calculation ...

Montage keyframes calculation error

Anim - Apr 28, 2016

Animations are not showing proper length when converted to Montage. Up to 98 frames (AFAIK) when converted to Montage, the Montage will show the correct number of keys. However, a 100-frame anima ...

FMultiReaderSingleWriterGT isn't thread safe

Core - May 17, 2016

From https://udn.unrealengine.com/questions/292741/fmultireadersinglewritergt-isnt-thread-safe.html: I've found that FMultiReaderSingleWriterGT has at least 2 bugs: The one that caused a deadlock ...

Behavior tree subtree switch reported as hitching

Gameplay - AI - Apr 4, 2016

Setup described in UDN post: parent tree: root - selector - run behavior task subtree: root - sequence - custom BP task with just print string repro: print string message (engine tick) is showing u ...

Spin box does not receive input in mobile preview

Tools - UMG - Sep 9, 2015

When using a spin box in mobile preview, the spin box does not appear to update. It will highlight when the mouse is over it but clicking and dragging will yield no value changes. ...

Engine module doesn't properly reference dependencies on the NetworkReplayStreaming module

Networking - Replay - Jan 12, 2016

Need to add NetworkReplayStreaming to the list of PublicIncludePathModuleNames in Engine.Build.cs ...

Visual glitches on Mac OS X using an Intel GPU while playing HW accelerated H264 video

Rendering - Dec 2, 2014

This looks to be a system driver bug, but logging here for transparency and future reference. It took me a long while to figure out that the key issue is a conflict during blit between UE4 and the H ...

Projects created outside root UE4 folder do not show up in Project Browser on Linux

Platform - Linux - Nov 25, 2014

If a user creates a new project on a Linux machine and specifies the project to be created in a folder outside of the root UE4 directory and /Documents/Unreal Projects/ folder, the project does not ...

Match3 Crashes on IOS and Android when Packaged using Nativized Blueprint Assets

Gameplay - Blueprint Runtime - Aug 19, 2016

Match3 crashes shortly after being opened on both Android and IOS devices when the experimental blueprints option "Nativized Blueprint Assets" is enabled. Verified that the issue does not occur if ...