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 ...

Scene Capture 2D will default back to View 0

UE - Graphics Features - Oct 8, 2015

The scene capture will revert back to the Character BP that is placed in the level when player 2 is not moving. When they are moving the scene captuer will show correctly. You can get around this ...

Physics constraint component doesn't work when placed inside a child actor, while using world partition and streaming is enabled

UE - Simulation - Physics - Mar 21, 2025

Context: In a World partition level, to reduce complexity and provide a scalable solution when creating new projects, grid cell streaming can be enabled. Problem: The problem is that physics constr ...

A replicated Timeline's Finished output does not fire on the Client if the Server changes the Timeline Length to a shorter duration

UE - Networking - Jan 28, 2016

A replicated Timeline's Finished output does not fire on the Client if the Server changes the Timeline Length to a shorter duration. Test project attached. Reproduced in 4.9.2 binary, 4.10.2 binar ...

Blueprint - Crash when a function takes an event as a parameter

UE - Gameplay - Blueprint - Oct 10, 2016

Looks like maybe we aren't replacing the source delegate function (SignatureFunction) reference on the UDelegateProperty after recompiling the class - the function's owner name has the TRASHCLASS pr ...

Existing widget name error from rejected widget object.

UE - Editor - UI Systems - Dec 5, 2017

Rejected widget object for paste action from other widget somehow remains in the widget editor making name conflict for other widgets. ...

Instanced EditInlineNew objects are parented to the CDO when used by a child BP of a parent BP that inherits from a native class

UE - Framework - Blueprint Runtime - Mar 21, 2024

EditInlineNew objects added to Instanced array stored in a struct are seemingly ignored and the object is instead parented to the CDO of the owner. The owner must be the BP child of a parent BP tha ...

Reference Viewer doesn't show references to Primary Asset IDs

UE - Editor - Applied Usability - May 13, 2025

Context Reference Viewer can be used to view references between assets. There is a setting 'Show Management References' whose tooltip implies that references via PrimaryAssetID should be findable t ...

Event Dispatcher not being called in 4.6

UE - Gameplay - Blueprint - Dec 8, 2014

ED nodes in 4.6 but are not being executed in standalone or cooked games. Also, users receive compile errors when the project is saved and reopened that resolve when the blueprint is recompiled. ...