CSM has artifacts if shadow distance less than 2000

UE - Graphics Features - Jun 12, 2019

CharacterMovement doesn't clear velocity

UE - Simulation - Physics - Oct 11, 2024

Velocities are not being cleared when physics simulation set to false.  ...

StructUtils plugin's `FInstancedStruct` in a CPP-defined struct in a `TArray` on an actor component defined in CPP and implemented in BP. Populating the instanced struct in an actor BP's class defaults breaks serialization of the class defaults.

UE - AI - May 30, 2025

Context Instanced structs are great for holding simple data with the main advantage they have is a low memory overhead unlike instanced objects. Problem The problem is in StructUtils plugin's `FIns ...

Startup Movies Fail to Play when Audio Devices are Disabled

Tools - Feb 1, 2016

If a user launches a project in Standalone mode and has a Startup movie while the audio devices on the computer are disabled, the movie will fail to play. As soon as you re-enable an audio device, ...

Old iTunes DLL causes UBT to fail on startup

UE - Platform - Mobile - May 2, 2022

Mesh painting on staticmesh doesn't always apply Colors to All LODs

UE - Editor - Content Pipeline - Asset Build - Apr 18, 2022

See the video [Link Removed] ...

Crash (Assertion failed "SystemInstanceController->IsSolo()") when enabling "Start with Tick Enabled" on a Niagara Component

UE - Niagara - Oct 17, 2024

Currently, Niagara Components are only expected to have their TickComponent() method called when their system is marked as "Solo", which makes them be simulated individually. In the most common scen ...

Editor Crash with corrupted asset when opening within level or via the content browser.

Tools - Jan 5, 2017

Editor will crash when a skeletal mesh has been added to a level and then reopening the project later if you try and access this level. If you attempt to open the skel meshes in the content browser ...

Crash when exiting editor before EditorUtilityTask completes

UE - Editor - UI Systems - May 29, 2024

If exiting the editor before the EditorUtilityTask completes, it crashes. It will not crash if canceling the UtilityTask and then exit the editor. The following implementation does not allow destruc ...

[CrashReport] UE4Editor_CoreUObject!PackageReloadInternal::LoadReplacementPackage() [packagereload.cpp:274]

Tools - Aug 17, 2018

No user comments in crash group 262 UPackage* LoadReplacementPackage(UPackage* InExistingPackage, const uint32 InLoadFlags) 263 { 264 if (!InExistingPackage) 265 ...