If use with mesh particles or use with niagara mesh particles is checked in the Usage flag of the material and the material domain is set to volume, compile error will occur.

UE - Niagara - Jan 5, 2021

[SM5] /Engine/Private/VolumetricCloud.usf(118,33-53): error X3018: invalid subscript 'VertexId' This is happening in VolumetricCloud.usf, but it seems that I can avoid the error by adding the follow ...

Unable to play replays with custom GameNetworkProtocolVersion set at runtime

UE - Networking - Sep 20, 2023

It seems that when comparing the custom versions for a replay (in the "operator<<" defined in ReplayTypes.cpp), the value retrieved from the FCurrentCustomVersions is not the value set at runtime, b ...

UGameUserSettings::ValidateSettings fails to wipe GameUserSettings.ini

UE - Framework - Mar 4, 2025

When changing the version in UGameUserSettings, the expected behaviour is that GameUserSettings.ini will be wiped/delete and then regenerated. The actual behaviour is that within the ValidateSetting ...

[Mootools Bug] SKP import - Mirrored groups will display with the default material in Keep Hierarchy imports

TM - Interoperability - Apr 10, 2025

Reported in SF [Link Removed] SketchUp models containing grouped elements that are mirrored will incorrectly display these elements with the default material when imported using the Keep Hierarchy ...

Control Rig Box Selection Innacurate

UE - ACT Character - Control Rig - Nov 17, 2025

When useing marquee select on controls in the rig, their on screen size determines how likely they are to be included in the selection which isn't a reliable enough method for animators. Our workaro ...

Negatively scaled box collisions render back faces in Player Collision debug view

UE - Runtime - Deformable - Sep 1, 2025

The player collision debug visualization for negatively scaled boxes is rendering the back faces, not the front faces. The debug primitives are rendered via the dynamic mesh builder. FDynamicMeshBui ...

Hang after you paste node data into Blueprint right click menu

UE - Gameplay - Blueprint - Mar 7, 2015

Hang after copying a BP node, right clicking in BP graph, then pasting with Ctrl+V. ...

Selecting vertices from multiple bsp brushes move in relative space and cannot be changed to world space

UE - LD & Modeling - Modeling Tools - BSP - Jan 16, 2015

BSP brushes only move in relative space instead of world space if the user has selected vertices from more than one bsp brush. User cannot change translation to worldspace instead of local space. ...

There is no way to add a value to an Actor variable in a Data Table

UE - Gameplay - Blueprint - Jan 21, 2015

There is no way to add a value to an Actor variable in a Data Table. Currently, Structs accept Actor as a variable type, though no default value can be set. If a Data Table is made from a Struct wit ...