Default Values missing from Local Variables in Blueprint Actor Construction Script

UE - Gameplay - Sep 19, 2019

Specific to the Blueprint Construction Script, Local Variables cannot have their value set in the Editor, because the "Default Value" section of the Details tab will never appear. This only affects ...

Vive - Motion Controller Component - Active Scene Capture causes 'Low Latency Update' lag

UE - Platform - XR - Sep 18, 2019

When a scene capture is active, attachment will lag behind parent. (Similar to [Link Removed] ) ...

Asynchronous Image Loading from Disk Documentation leads to memory leak

Docs - Sep 18, 2019

The documentation example to create your own asynchronous image load from disk results in a memory leak that is noticeable using the task manager.  ...

Animation sub instances tick twice with a post processing BP

OLD - Anim - Sep 18, 2019

An animation's sub instances will tick twice per frame if a post processing BP is set. ...

Mouse Resizing Cursor not Displaying Properly

UE - Editor - UI Systems - Slate - Sep 18, 2019

Following the steps above will result in the resizing cursor not appearing properly for stand-alone game windows. The resizing cursor will appear to flash very quickly and then go back to the regula ...

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 ...

Crash after clicking the Build button on Linux

UE - Platform - Linux - Sep 17, 2019

This crash is a regression from 4.22.3 (CL-7053642). If lighting is built by selecting "Build Lighting Only" the Editor will not crash. This does not reproduce on Windows with -vulkan. This was rep ...

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 ...