Complex Collision as Simple causes odd Overlap behavior

UE - Simulation - Physics - Jan 25, 2016

When triggering overlap events with a Static Mesh using Complex Collision as Simple, the overlap Begin and End events will be triggered rapidly in sequence. Changing to Default collision will fix t ...

Parent Begin Play node does not appear to run the parent code class BeginPlay() function before the rest of the Blueprint's Begin Play functionality

UE - Gameplay - Blueprint - Feb 19, 2015

If a Blueprint event graph contains a Begin Play node that connects to a call to the parent function, the functionality present in the Blueprint Begin Play segment is run before the parent Begin Pla ...

The OnUnPossess() method of the AAIController class is triggered twice

UE - AI - Apr 21, 2020

The OnUnPossess() method of the AAIController class is triggered twice ...

Cloth rendering issue on triangles sharing kinematic attachments.

UE - Simulation - Physics - Character - Jul 29, 2020

All render vertices on any cloth triangle that contains one or two fixed vertex are set as fixed, whereas this should only be the case if all three vertices were fixed. ...

Some post-processing passes sample outside of the viewport when using scene capture components

UE - Graphics Features - Nov 29, 2023

It looks like the SSAO shader does not clamp its sample space to the half view size for the two inputs "Ambient Occlusion" and "AmbientOcclusionSetup", leading to invalid data entering the edge of f ...

Renaming a custom component code class and performing a Hot Reload will cause the Editor to crash when a Blueprint containing an instance of that component class is opened.

UE - Gameplay - Blueprint - Nov 26, 2014

Renaming a custom ActorComponent class when that class is set as a component in a Blueprint and performing a Hot Reload will crash the Editor if the Blueprint is opened for editing after the project ...

Destroying Actor via RepNotify After Seamless Travel Causes Pending Kill Warning

UE - Networking - Dec 15, 2016

Attempting to destroy an actor via a repnotify after seamless travel is causing the actor to fail to be destroyed because of a pending kill warning: [2016.12.15-19.10.13:936][574]LogNetPackageMap:W ...

Calling DiscardPlayerInput() does not appear to actually discard the player's input

UE - Gameplay - Jun 19, 2018

Calling DiscardPlayerInput() does not appear to actually discard the player input. The comment for the function indicates that input will be consumed and discarded without doing anything with it. Ho ...

bIgnoreAllPressedKeysUntilRelease behaves differently for triggers in EnhancedInputAction and triggers in InputMappingContext

UE - Gameplay - Input - Aug 10, 2023

For actions that are triggered on the Input mapping context, simply adding or removing an InputMappingContext with no related key override with the bIgnoreAllPressedKeysUntilRelease option will caus ...