Atmosphere related scan line artifacts for Path Tracer with MGPU

UE - Graphics Features - Path Tracer - Feb 10, 2023

There are two UDNs related to this issue.  It makes the Path Tracer unusable with MGPU, with atmosphere enabled. I already have a one-line fix implemented and tested.  The atmosphere scan line arti ...

Alpha blending is done twice when using RenderOpacity of RetainerBox's parent slot

UE - Editor - UI Systems - UMG - Feb 10, 2023

Licensee reported that alpha blending is done twice in the code below, and the fix below seems to fix it. .\Engine\Source\Runtime\UMG\Private\Slate\SRetainerWidget.cpp From:const FLinearColor Compu ...

Errors occur when moving duplicated Material Instances

UE - Rendering Architecture - Materials - Feb 9, 2023

Licensees have reported that two UMaterialInterfaceEditorOnlyData objects are being created for duplicated assets, causing a name conflict when renaming. ...

Editor Crashes when copy/pasting an emitter in the Niagara timeline

UE - Niagara - Feb 8, 2023

When creating the emitter's track widget we search for the stack view model's root entry, but the stack view model pointer is null, so we crash.  ...

NiagaraEditor timeline folders are not saved correctly

UE - Niagara - Feb 8, 2023

It works correctly in 5.0.3. ...

Material Layer Texture Params don't warn on different sampler types

UE - Rendering Architecture - Materials - Feb 7, 2023

This texture validation exists for global parameters, and should read as "Warning: Param samples /Engine/Functions/Engine_MaterialFunctions02/ExampleContent/Textures/newhplaneNormalsMap.newhplane ...

Syncing issue when stopping and blending out a non-looping montage to an anim graph

UE - Anim - Gameplay - Feb 7, 2023

When syncing from a non-repeating montage that is blending out to an anim graph, the anim montage is marked as a follower due to having its PrevMaker as an AnimBoundary(-1), furthermore in this case ...

LogUMG: Error: The requested size for SRetainerWidget is 0. W:739 H:0 when opening or updating a curve using the StackedCurve view

UE - Anim - Sequencer - Feb 6, 2023

The following error is generated in the Output log whenever a Wave Table is opened or any of the graphs are modified. It also occurs when adding an Input to a Sound Modulation Parameter patch or add ...