Editor FPS has significant drop when moving a BSP brush in level with multiple BSPs

UE - AI - Navigation - Jan 8, 2025

Editor performance plummets when moving BSP brushes in a level with several other BSP brushes present. Navmesh regeneration is the main cause as the full bounds for all BSP are used to determine whi ...

Retargeting Retain Additive Flags option keep reference to the original sequence in additive settings

UE - Anim - Rigging - Retargeting - Sep 24, 2024

Asset Details > Additive Settings when retargeting are copied over but reference to the animation sequence that was used in the original is kept. Batch retargeting process correctly identifies that ...

Depth Not Rendered Correctly When Using CustomProjectionMatrix in SceneCaptureComponent2D

UE - Graphics Features - Apr 15, 2020

The depth is rendered incorrectly when using a custom projection matrix in SceneCaptureComponent2D. You can find an example project at [Link Removed]. You can find where the CustomProjectionMatrix ...

The Top Down template TopDownController has Block Input enabled by default

Docs - Samples - May 19, 2015

The Top Down template TopDownController has Block Input enabled by default. This is potentially confusing for new users not aware of this difference. Note that due to [Link Removed], testing this r ...

Imported animations don't import correctly when using same import settings as skeletal mesh it's based off

UE - Editor - Content Pipeline - Datasmith - Importer - Jul 10, 2019

When importing an animation using the same import settings as the imported skeletal mesh it is meant for part of the mesh is rotated 90 degrees around the root. The files that were used to verify th ...

Broken hair material with light function

UE - Graphics Features - Dec 19, 2024

Hair Materials do not react to Light Functions in the same way as other Materials. There is a visual difference between a Directional Light at 1 lux with no Light Function and a Directional Light at ...

Crash when creating StaticMesh repeatedly

Tools - Nov 21, 2014

UE4Editor crashes when creating static meshes. Event at startup time while it tries to create default object it crash sometimes. ...

SetGamePaused on EventDestroyed crashes the editor on compile

UE - Gameplay - Blueprint - Apr 1, 2015

SetGamePaused on EventDestroyed crashes the editor on compile. Reproduced in 4.7.3 binary and Main (//depot/UE4/Promotable-CL-2496752) Crash Report: [Link Removed] Call Stack: UE4Editor_Engine! U ...

The Left Mouse Button Pressed event is not firing when Input Mode Game Only is set and Show Mouse Cursor is true

UE - Editor - UI Systems - Slate - Sep 20, 2019

The Left Mouse Button Pressed event is not firing when Input Mode Game Only is set and Show Mouse Cursor is true. Attached is an example project (4.23) that demonstrates the issue. Found in 4.23.0 ...

Crash using Import Commandlet on FBX that gets "Bones are too small" error when imported manually

UE - Editor - Content Pipeline - Import and Export - Feb 23, 2017

Crash using Import Commandlet on FBX that gets "Bones are too small" error when imported manually Error from manual import: Warning The bone size is too small to create Physics Asset 'ButterflyVa ...