Unreal Engine Issues

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

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 ...

ElapsedTime is very inaccurate (uses timer to update)

Opacity is not receiving Input for Material Functions

Opacity is not working with a material function "Make Material Attributes" node. ...

WalkableSlopeOverride does not work for individual skeletal mesh body shapes

Walkable slope override (per-instance override of walkable angles for characters) is not used if edited per shape on the body. ...

Android streaming audio repeats at start if start time is 0.0

An audio file needing decoding (streaming) will repeat at the beginning of play if the start time is 0.0. ...

Reflection Capture Crash, LPV related

UE4Editor_Renderer!FDeferredShadingSceneRenderer::RenderLights() [d:\usr\test\ue4\engine\source\runtime\renderer\private\lightrendering.cpp:551] UE4Editor_Renderer!FDeferredShadingSceneRenderer::Ren ...

UAIPerceptionStimuliSourceComponent never registers with required senses

UAIPerceptionStimuliSourceComponent::OnRegister tries to remove nulls from RegisterAsSourceForSenses but the condition in RemoveAllSwap is wrong. It should be SenseClass == nullptr instead. ...

Make AGameMode::FindInactivePlayer and related functionality easier to overload

Investigate implementing the suggestions in the post at the additional info URL. The user ran into multiple issues trying to customize the behavior of inactive players rejoining. ...

Infinite loop in FAnimMontageInstance::Advance

Running a montage (given as a link on the UDN Thread) in reverse causes the editor to enter an infinite loop during FAnimMontageInstance::Advance ...

ListenerOverride doesn't work on Mac or Linux

A licensee (see UDN link) has reported that ListenerOverride isn't working on Mac and Linux. I've looked at the code and it doesn't appear to have anything that would cause it to behave different on ...