Projects with "TargetPlatform" set as a dependency cannot be packaged to Windows 64-bit if the project is made using the binary version of the Editor..

UE - Foundation - Core - Apr 10, 2015

Including "TargetPlatform" as a private dependency of a code project created using the binary version of the Engine prevents the Editor from being able to package the project for Win64. Removing the ...

Lumen indirect lighting artifacts when far from world origin

UE - Graphics Features - Lumen - Feb 6, 2024

Lumen seems to not be using Large World Coordinates somewhere. The Lumen Scene develops artifacts at large distances (5000 KM) from the world origin. ...

Startup Movies not Copied to Content/Movies Directory in Content Browser

Tools - Oct 5, 2016

Startup movies are not being copied to the Content/Movies directory within the Content Browser. This can be confusing to users as it is not editable, but still functions correctly as a startup movie ...

TUnion copy constructor causes the editor to assert due to Unrecognized TUnion subtype

UE - Foundation - Core - Mar 15, 2016

The TUnion copy constructor causes the editor to toss an assert due to it claiming that the passed in TUnion is of an Unrecognized TUnion subtype. ...

Mobile Preview - Custom Stencil 4.23 Regression

UE - Platform - Mobile - Oct 25, 2019

Regression when using custom stencil with in-editor mobile preview. This does NOT reproduce in MAIN at CL 9730599 ...

The Find Node Can Crash on Compile After a Blueprint Compile Error

UE - Gameplay - Nov 21, 2019

The "Find" node can cause a crash if the a map with a struct value changes type while connected, is disconnected and reconnected. Compilation fails and crashes the engine. Found in 4.23.1 CL#963142 ...

first struct variable not shown by Intelisense

UE - Foundation - Core - Feb 18, 2015

When invoking a custom struct, the first listed variable will not appear in the Intelisense window. ...

Planar Reflection with Exponential Height Fog flickers on iOS

UE - Platform - Mobile - Oct 28, 2016

Planar Reflections have noticeable gaps in the reflection of the exponential height fog for the scene that will flicker as the camera moves. Attached ipa link and test project. [Link Removed] Te ...

Some Planar Reflections not working on more than one surface if it's a single mesh

UE - Graphics Features - Nov 2, 2016

Planar Reflections only work with a single surface or limited surfaces when it's a single mesh vs multiple meshes making up the piece. Attached is a sample project that will show the issue. Level ...

Anim Notify blueprints are included in packages when not referenced

UE - Foundation - Core - Cooker - Sep 17, 2018

Anim Notify Blueprints are included in Packaged builds of the editor even if they are not referenced. This does not occur with other Blueprint classes, such as Actor, although it may with some other ...