SWidget: Add support for ScrollBox in GlobalInvalidation mode

UE - Editor - UI Systems - Slate - Sep 1, 2020

SScrollBar SScrollBarTrack SScrollBorder SScrollBox ...

Update warning in FActiveGameplayEffectsContainer::ApplyModToAttribute to consider batching

UE - Gameplay - Gameplay Ability System - Feb 19, 2021

The ModcallbackData won't be consumed while applying stacked Gameplay Effects if the updates are being batched. This triggers a false warning in FActiveGameplayEffectsContainer::ApplyModToAttribute. ...

Problems in skeletal mesh merge

UE - Editor - Content Pipeline - Asset Build - May 10, 2021

There are a few issues a licensee has found with the skeletal mesh merge operation. See the UDN for more details and the proposed fixes. Note, the issue with the cloth merge is already logged in a ...

[Feature Request] Niagara Ribbon Render needs V direction Tessellation option

UE - Niagara - Aug 8, 2021

It has a common chunking visual artifacts that lot's of triangular Translucent overlap once Ribbon's width is big and twisted heavily facing to Camera [Image Removed] It can be fixed by adding mor ...

Groom bound to GeometryCache is unstable

UE - Editor - Content Pipeline - USD - Aug 10, 2021

This issue seems to occur only in 4.27 with DX12. Did not repro in 4.27 with -dx11, nor in UE5 DX11/DX12. ...

Changes to Material Instance Parent don't appear to propagate to child instances if the child instance's editor window is open

UE - Rendering Architecture - Materials - Aug 16, 2021

It looks like this occurs when the grandchild instance window is open. If you close and reopen the Grandchild's window the parameter appears as expected. I've attached a project with the setup step ...

VT Material Instance Crash - "ProducerDesc.BlockHeightInTiles << MipBias == BlockHeightInTiles"

UE - Graphics Features - Oct 4, 2021

Assertion failed: ProducerDesc.BlockHeightInTiles << MipBias == BlockHeightInTiles [Link Removed] [Line: 229] ...

Assign node on floats can cause a crash at runtime

UE - Gameplay - Blueprint Compiler - Apr 25, 2022

This is from a UDN and I was not able to reproduce it locally in Release-5.0 or Ue5/Main, creating this issue for tracking.  ...

Crash when using fbx exporter multiple time in the same process

UE - Editor - Content Pipeline - Import and Export - Sep 27, 2022

The different fbx exporters do not cleanup the fbx sdk manager ...