Reset seed on emitter looping not working properly

UE - Niagara - Dec 31, 2019

The "Reset Seed on Emitter Looping" has no effect when enabled.   Tested in: 4.22.3 CL#7053642 , 4.23.1 CL#9631420 , 4.25 CL#10868506 ...

Editor Periodically Has Performance Drops In Basic Scenes

Tools - Dec 27, 2019

The Editor experiences performance drops even in the default basic level when left alone running. I experienced them every ~3 seconds. My graph didn't show the drops very clearly so the fps counter ...

Generating mip map settings not building properly for texture array

UE - Graphics Features - Dec 27, 2019

When mip gen settings on a texture array is changed, the texture does not build properly. ...

USpringArmComponent::UpdateDesiredArmLocation does not update overlaps

UE - Simulation - Physics - Dec 20, 2019

Objects attached to a spring arm component, moved by changes to the target length/rotation, do not have their overlaps updated. USpringArmComponent::UpdateDesiredArmLocation calls USceneComponent ...

Alembic Hair Doesn't Render In Both Eyes In VR

UE - Platform - XR - Dec 20, 2019

Alembic hair doesn't render in the right eye in VR. A demonstration project can be found [Link Removed]. NOTE: The hair is rendered as an overlay in other editor previews (skeletal mesh, Physics). ...

Automotive Photo Studio Template project renders custom render passes incorrectly

UE - Editor - Content Pipeline - Datasmith - Importer - Dec 19, 2019

Renders with a custom render pass from the level in the Automotive Photo Studio Template are incorrect. They appear to be affected by auto exposure.  ...

Content Browser does not sort names using numbers properly when going over 9

Tools - Dec 19, 2019

This can happen when creating any content or duplicating them. I was also able to reproduce this issue in the Levels window when creating new levels.  ...

Raytracing shadows and lighting not showing in rendertarget

UE - Graphics Features - Lumen - Dec 19, 2019

Raytracing shadows and light reflections not appearing in render target Tested in: 4.22.3 CL#7053642 4.23.1 CL#9631420 4.25 CL#10730208 ...

Light shaft bloom produces heavy flickering when offscreen

UE - Graphics Features - Dec 18, 2019

See attached video. Happens always in editor, will also happen in standalone game but only if viewport rect has not the full window size. The issue was not present in 4.22. Update 1/22/20:  A ...

Depth of Field blur width changes depending on screen resolution

UE - Graphics Features - Dec 18, 2019

This problem seems to occur with Cinematic DoF (DiaphragmDOF). Licensee seems to want to use the same blur when changing resolution. ...