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 ...

The Radial Blur Shader Doesn't Look Correct With Raytracing Translucency Enabled

Rendering - Ray Tracing - Jan 21, 2020

The Radial Blur shader doesn't look correct with ray tracing translucency enabled. Found in 4.24.1 CL#10757647 Reproduced in 4.25 Main CL#11050671 ...

Materials using the Tessellation mode 'PN Triangles' cause objects to incorrectly render in Wireframe view mode when selected

Rendering - RHI - Jan 21, 2020

Creating a material that has it's tessellation mode set to "PN Triangles" and assigning it to an object results in the objects geometry to not properly display in Wireframe view mode.  Tested i ...

Alembic Hair Groom Asset + DoF = artifacts around edges

Rendering - Features Teams - Jan 21, 2020

Hair assets show artifacting between strands when used with DoF. Confirmed in MAIN 4.25 @ CL 110623791 ...

SSGI doesn't function properly using Vulkan

Rendering - RHI - Jan 20, 2020

Screen Space Global Illumination appears really dark when using the Vulkan RHI on Windows and Linux. This behavior is also present in a Shipping build. This was reported and tested on 4.24.1 (CL-1 ...

Default lux setting for ArchVis template causing render issue for 3d Widget blueprints and Materials set as "Unlit"

Rendering - Features Teams - Jan 20, 2020

The ArchVis template's default lux setting for the scenes directional light causes improper rendering on newly created materials and 3D widgets set to Unlit.  Project attached with material made, s ...

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 ...