BP timelines: when converting internal curve to external, the external curve isn't used until BP is recompiled

UE - Gameplay - Blueprint Editor - Aug 28, 2023

Blueprint timelines: when converting an internal curve to an external curve asset, the curve asset's data isn't used until the blueprint is recompiled. This is confusing as there is no indication th ...

'GetClassDefaults' Can Cause Blueprint To Become Modified When Unrelated Blueprint Is Compiled

UE - Gameplay - Blueprint - Sep 22, 2023

The stems from a really old change (CL 2948683) to fix [Link Removed]. Compiling ObjectA will call RefreshExternalBlueprintDependencyNodes on its dependent BP,  ObjectB_ReferencesA, which reconstru ...

XAudio2 DestroyVoice call causes significant hitching on some architectures

UE - Audio - Aug 10, 2015

Another thread: https://answers.unrealengine.com/questions/241358/amd-cpu-very-low-performance-because-ixaudio2sourc.html Note: This not a regression and has existed since our first implementation ...

Using Show Mouse Cursor and Ejecting Prevents Actors from Being Moved

Tools - Mar 31, 2016

When you have the mouse cursor set to show in game, if you use shift+f1 to unlock the mouse, eject, and then attempt to click and move an actor using the transform gizmo, you are unable to do so. S ...

Auto-weld is Enabled even if the blueprint component is set to Simulate

UE - Simulation - Physics - Jan 4, 2017

Auto-weld is Enabled even if the blueprint component is set to Simulate. This only effects blueprint, static mesh actors in the world still disable Auto-weld if set to Simulate. This is a Regressio ...

Static Mesh Editor: Give options for drawing complex/simple collision

UE - Simulation - Physics - Mar 13, 2017

The collision mesh and the display mesh are often similar enough to be difficult to differentiate, and there is currently no way to view the collision wireframe without the display wireframe as well ...

Project cant package with Nativize on and Widgets as value in TMap

UE - Gameplay - Blueprint - Jun 15, 2017

When packaging with nativization if you have a widget as a value in a TMap, the package will not finish building. The TMap will throw an error during the Package process that reads: UnrealBuildToo ...

Colors of Individual Lens Flare Tints Cannot be Changed in UE 4.18+

UE - Graphics Features - Jun 15, 2018

If you create a project in 4.17 and follow the Repro steps, you will be able to adjust the colors of individual lens flares. If you copy the 4.17 project into 4.18, 4.19, 4.20 Preview, or 4.21 the f ...

Foliage is Offset When Streaming Existing Levels From World Composition

UE - World Creation - Worldbuilding Tools - Foliage - Jul 3, 2018

Streaming an existing level that used World Composition places the landscapes in the correct spot, but any foliage tied to that landscape is placed on the landscape tile at 0,0 instead of its corres ...

[Landscape] returns Incorrect Physical Material

UE - Simulation - Physics - Aug 13, 2018

Doing a line trace on a landscape does not return the correct physical material unless "Generate Overlap Events" was enabled after changing the physical material. If the physical material on the lan ...