Creating BlueprintActor from EmptyActor produces an Actor with multiple DefaultSceneRoots

Gameplay - Blueprint - Jan 24, 2020

This does not happen with UE4.22. Maybe related to CL#7462096 and CL#7476283. These are fixes for UE-74598. ...

Failed assertion on creating a basic chaos geometry collection and PIE

Physics - Jan 23, 2020

User encounters a failed assertion when trying to create a simple geometry collection from a box ...

With Ray Tracing Enabled And The RenderDoc Plugin Enabled Shadows Don't Render Correctly On Reflective Materials

Rendering - Ray Tracing - Jan 23, 2020

When the RenderDoc plugin is installed with raytracing enabled shadows don't render correctly. Found in 4.24.1 CL#10757647 Reproduced in 4.23.1 CL#9631420, 4.25 Main CL#11087956 ...

Shader compiler errors when using enclosed local variables in a material while ray tracing is enabled

Rendering - RHI - Jan 23, 2020

A licensee is seeing an issue with a couple of post process materials after enabling ray tracing. While the materials presenting the issue fail to compile for different reasons, they both refernce t ...

Planar Reflections Cause Big Performance Hit In Packaged VR Projects

XR - Jan 22, 2020

Planar reflections notably lower performance in packaged VR project. Linked is an example project and an example package. [Link Removed]. This was tested on a Vive Pro and Oculus Rift(not Rift S). ...

HUD functionality is lost load after upgrading project to 4.24.1

Tools - Jan 22, 2020

Upgrading a project to version 4.24.1 results in a loss of functionality that worked from 4.20 to 4.23.1 without having made any changes. Test Project: [Link Removed] Tested: 4.25 CL: 11062379 ...

Linked Anim Graph With Mesh With Post Process BP Has Faster Animation Playrate

Anim - Jan 20, 2020

When an animation blueprint is using the "Linked Anim Graph" node and it's skeletal mesh has a post process animation blueprint the animation is played at the wrong playrate. Linked Anim Graphs wer ...

StopAtCurrentTime Node Sets Playback Position To 0.f In Level Sequence Actors

Tools - Sequencer - Jan 20, 2020

Level Sequence actors have their current playback time to 0.f when using the StopAtCurrentTimeNode. In MovieSceneSequencePlayer.cpp line 288 TimeToResetTo is set to 0.f. Attached is a 4.24 example ...

Importing fbx with armature resulting in crash

Tools - Import - Jan 20, 2020

Importing an fbx file with armature on MAC results in crash Tested: 4.23.1 CL#9631420, 4.25 CL#10889200 ...

Nativized UMG widgets with animation tracks can sometimes assert with async loading enabled.

Gameplay - Blueprint - Jan 18, 2020

The incorrect use of NewObject() to instance nested class-owned subobjects will force StaticAllocateObject() to reconstruct the instance that was already constructed by the outer class ctor in nativ ...