Crash when changing to Mesh LOD Coloration view mode with Paper2D sprites

UE - Graphics Features - Jan 11, 2021

Crash in the editor when changing the view mode. This occurs because of a nullptr dereference of "InMaterialInterface" in the FDebugViewModeMaterialProxy constructor (Line 32 in DebugViewModeMateri ...

[Soundfield Submix][Crash] - Unreal Ambisonics Crashes on Packaged Game and in Standalone

UE - Audio - Submixes - Jan 11, 2021

Issue was reported by a user on the Unreal Engine forms. I tried to package the game with the other encoding options and this appears specific to using the Unreal Ambisonics option.  I have only co ...

Selecting multiple actors with differing DataTableHandles causes data loss

UE - Gameplay - Jan 4, 2021

The data table customization (and probably others) tries to aggressively clear out row references that are not valid in the table they point to. This breaks when selecting multiple actors or objects ...

Black viewport with artifacting when changing to MSAA with Forward Shading enabled

UE - Graphics Features - Dec 2, 2020

DID NOT OCCUR IN BP FPS PROJECT - might be ContentExamples specific This issue does not occur when forward shading is disabled. Viewport error reads: TOO MANY OVERLAPPING SHADOWED MOVABLE LIGHTS ...

DisplayName Metadata tag is not used in the SCS editor or the My Blueprints window

UE - Gameplay - Blueprint Editor - Nov 12, 2020

This also brings up a good point about how `FName::NameToDisplayString` works. Currently it will only remove a 'b' character if a boolean is given, which leads to inconsistent results throughout the ...

Linux Editor creates multiple installation identifiers for itself if Install.ini is removed

UE - Platform - Linux - Sep 17, 2020

The first ID contains brackets and a trailing slash while the second does not. Alternatively if the engine is opened with a .uproject argument no ID will be created until the "Open Project" dialog i ...

Niagara Parameter Collection Overrides aren't working

UE - Niagara - Aug 20, 2020

Parameter collection overrides defined in the Niagara system's System Properties do not work. In FNiagaraSystemSimulation::GetParameterCollectionInstance the return value of GetParameterCollectionO ...

Fix primitive uniform buffer validation.

UE - Rendering Architecture - RHI - Jul 31, 2020

GPUScene primitive validation is currently busted and asserts. It looks like there are two problems: 1) NaN's in the entries can cause comparison issues, so a MemCmp would be better. 2) There's a ...

Actors are not properly restored when undoing a Replace Selected Actors transaction

UE - Gameplay - Components - Jul 22, 2020

When undoing a Replace Selected Actors operation, the resulting actor is corrupt and triggers an ensure where the root component is in the process of being destroyed. This is a regression that poppe ...

Nodes of inherited function don't refresh automatically in the opened BP editor if implemented interface is altered

UE - Gameplay - Blueprint Editor - Jul 14, 2020

Nodes of inherited function don't refresh automatically in the opened BP editor if implemented interface is changed.Workaround: refresh nodes manually Regression: NO Can be reproduced on the 4.25.1 ...