Crash when editing FRuntimeFloatCurve's curve from sequencer's edit key window

UE - Anim - Sequencer - Mar 31, 2023

Crash when editing a FRuntimeFloatCurve curve exposed through EventTrack or a self-made Struct from the sequencer key edit window. FRuntimeFloatCurve does not support Expose to Cinematic, so this m ...

Blend Stack node doesn't have a valid FDeltaTimeRecord

UE - Anim - Runtime - Apr 19, 2024

The blend stack node doesn't generate any values for its DeltaTimeRecord.  This can be tested with the fix for [Link Removed] shelved at 32747789.  Since there isn't a tick record directly associate ...

Add Substrate Material Support to Lumen Performance Overview

UE - Graphics Features - Substrate - Feb 10, 2025

There is a discrepancy when inspecting Substrate materials in the Lumen Performance Overview. Compared to viewing non-Substrate materials the overview show all surfaces in red indicating that Lumen ...

The option to add a component to an Actor Blueprint from inside a child Actor Component BP isn't available

UE - Gameplay - Dec 16, 2015

The option to add a component to an Actor Blueprint from inside a child Actor Component BP isn't available. Using Get Owner inside the Actor Component's Event Graph and then casting to the owning Ac ...

"Diff Against Depo" Does not Display Changes to AI Controller Property

UE - Gameplay - Blueprint Editor - Mar 2, 2016

When using Diff Against Depot to see changes made to a file since it was last checked in, changes made to the AI Controller default property are not displayed under the defaults section. Found in ...

Cannot move instances of a hierarchical static mesh component in the blueprint editor viewport

UE - Gameplay - Components - Apr 12, 2016

Can move individual mesh instances of a regular instanced mesh component in the blueprint editor, but not hierarchical ones. Originally reported as a pull request in [Link Removed], but we rejected ...

Cannot Create a New Project if Windows Username Contains a Special Character

Tools - Oct 26, 2015

If you have a windows username with a special character (in this case, it was ^), the launcher will not allow you to create a new project, and a warning appears indicating that the path cannot conta ...

Spawning Component with Exposed on Spawn Variables Returns Incorrect Owner

UE - Gameplay - Components - Jan 12, 2016

Attempting to get the owner of an Actor Component that contains an exposed variable will return the Spawner blueprint's display name instead of the Spawned Actor it is added to. Found in 4.10.2 bin ...

Collision Preset Cannot Be Changed On an Actor Containing a Scaled Root Component

UE - Gameplay - Jan 15, 2016

In an actor that contains a scaled root component, it is not possible to change the collision presets on an instance of that actor if you are using the Viewport's Details panel. However, in the blue ...

List Referenced Objects does not show referenced objects for a .umap asset

Tools - Apr 1, 2016

Opening the Reference Viewer for a level then right clicking on the level and selecting List Referenced Objects displays a message prompt stating "Object 'LevelName' doesn't refer to any non-ignored ...