Creating a BSP modifies the default brush, adversely affecting placement of Volumes

UE - LD & Modeling - Modeling Tools - BSP - Aug 12, 2016

When a new BSP is created, modifications are made to the level's default brush. These changes affect how volumes are placed, with different BSPs causing different behavior in volume placement. ...

Incorrect behavior from RotateAboutAxis material node

UE - Graphics Features - Feb 24, 2017

Looks like the axis creation may be failing in some cases causing the rotation to generate a bad result. ...

"ERROR: Client target not found!" When packaging client after enabling or disabling a plugin

Tools - Jun 5, 2018

"ERROR: Client target not found!" When packaging client after enabling or disabling a plugin. This will happen on both developer or shipping client as the build configuration.UATHelper: Packaging (W ...

Sequencer render movie output not rendering Construction Script results

UE - Anim - Sequencer - Nov 15, 2018

The rerun construction feature works while scrubbing/playing in the sequencer and observing the results in viewport, However, when outputting the movie using Sequence Movie Output. The results of th ...

Adding Niagara system to a projectile causes a crash

UE - Niagara - Jul 29, 2019

Adding a Niagara system to a BP_Projectile in a C++ First Person Project  and then restarting it causes the editor to crash. Tested in 4.21.2 (CL - 4753647), 4.22.3 (CL - 7053647), 4.23 (CL - 744 ...

Anim sequence in DLC leads to crash in IOS.

UE - Platform - Mobile - May 19, 2020

DLC download is working as expected but opening a map with anim sequence which is located at DLC's pak file will lead to crash in iOS. ...

Transform gizmo behaves incorrectly in the Blueprint editor viewport if multiple child components are selected and their parent component is rotated 90 degrees around Z.

UE - Framework - Blueprint Editor - Nov 12, 2020

When multiple child scene components are selected and their parent is rotated 90 degrees about Z, attempting to use the transform gizmo will move the components in the wrong direction relative to th ...

Motion blur on player/weapons with TAA

UE - Graphics Features - May 27, 2021

Looks like this can occur with motion blur off aswell, so likely it's a TAA motion vector issue. Similar issue occurs in UE5 (see [Link Removed]) ...

Renaming a SkinnedMeshComponent onto a different owning actor will cause issues with FAnimUpdateRateManager

UE - Anim - Runtime - Aug 12, 2021

As mentioned in the UDN - the user tried to rename an SMC to a different actor, which leaves the URO manager left with an incorrect data as it is not aware of the move. User proposed overriding Post ...

There's no motion blur on streaming GeometryCache

UE - Editor - Content Pipeline - Datasmith - Sep 28, 2021

UDN customer mentioned: "there looks to be support for motion vectors as exported from DCC apps (for rare cases like fluid sim), but regular in-engine motion vector calculation for regular motion bl ...