GenerateVisibileRayTracingMeshCommands Severely Reduces Foliage Performance Even if no RayTracing is Used

UE - Graphics Features - Lumen - Sep 18, 2019

GenerateVisibileRayTracingMeshCommands Severely Reduces Foliage Performance Even if no RayTracing is Used. Found in 4.23 CL# 8386587 and 4.24 CL# 8748719 ...

Niagara crashes with skeletal mesh sampling in GPU system in Vulkan

UE - Niagara - Sep 17, 2019

Switching over to GPUCompute with Skeletal mesh surface sampling will crash in Vulkan. This does not occur with CPU sims or in D3D. When testing with D3D I would get the same Niagara compile warning ...

GameplayAbility Blueprint's FGameplayAttribute does not retain value reference upon Compile

UE - Gameplay - Sep 17, 2019

GameplayAttribute-type function arguments in BP-callable functions(I.E a Blueprint event graph) or nodes have their value reset on BP compilation ...

Diffing Tool showing false positive when diff'ing identical blueprints using FText input pin

UE - Editor - UI Systems - Localization - Sep 17, 2019

When diffing the two blueprints, the FText values are deemed different when they are the same. A workaround has been found by doing a pure string-compare for FText inside "GraphDiffControl::ArePinsD ...

Root motion with SubAnimInstance can cause notifies to not trigger.

OLD - Anim - Sep 16, 2019

Setting up root motion in a sub instance to RootMotionFromEverything seems to cause the sub instance to evaluate, and override the notifies of the animation that was playing, which prevents the noti ...

When searching for the "Timespan / float" the Context Sensitive search returns "Timespan * float"

UE - Gameplay - Sep 13, 2019

When searching for the "Timespan / float" the Context Sensitive search returns "Timespan * float". Found in 4.22.3 CL#7053642 Reproduced in 4.23.0 CL#8386587, 4.24.0 Main CL#8671808 ...

Anim with rate scale other than 1.0 will not loop correctly in Sequencer when using an Anim Blueprint

UE - Anim - Sequencer - Sep 13, 2019

Animations are looped incorrectly when using an animation blueprint and a rate scale other than 1.0 in Sequencer. ...

Both HLOD and StaticMesh Visible in Play Modes

UE - World Creation - Worldbuilding Tools - HLOD - Sep 12, 2019

 Both HLOD and StaticMesh Visible in Play Modes. Found in  4.23 CL# 8386587 and 4.25 CL# 8569829 ...

Unable to connect to Pixel Streaming when using FireFox

PixelStreaming - Sep 11, 2019

It appears that Pixel streaming does not currently work with the Mozilla Firefox web browser Docs link: https://docs.unrealengine.com/en-US/Platforms/PixelStreaming/PixelStreamingIntro/index.html ...