Using GENERATED_BODY() instead of GENERATED_UINTERFACE_BODY() in an Interface code class results in a UHT crash when trying to build the project.

UE - Foundation - Core - Mar 3, 2015

Replacing GENERATED_UINTERFACE_BODY() with GENERATED_BODY() in 4.7.0 or above results in an Unreal Header Tool crash and build failure in Visual Studio. This was working in 4.6.1, but when tested i ...

Animation retargeting adversely affects looping animations

OLD - Anim - Nov 21, 2014

Retargeting a skeleton to a looping animation results in the animation skipping at the end of the loop (Appears to miss 1 or 2 frames.) ...

Expanding and altering a macro affects other macros in use.

UE - Gameplay - Blueprint - Nov 6, 2017

Using the Expand node feature on a macro from a macro library alters the current functionality of other instances of the macros that are in use(even though the macros themselves have not changed). ...

ILC/VLM doesn't affect Static Staticmesh at all on Mobile

UE - Platform - Mobile - Sep 23, 2019

In practice, developer wants some Static-Staticmesh actors don't build lightmaps to save iteration time as well as Memory and Package size; but still want lit by Indirect lightings ...

Content in the BP Templates folders is located in a subfolder with the name of the template along with empty folders

Docs - Samples - Jan 16, 2015

Content in the Blueprint Templates folders for 4.7 templates (by default: C:\Program Files\Unreal Engine\4.7\Templates) is located in a subfolder with the name of the template. The rest of the folde ...

Game Controller Input affects editor input fields

Tools - Jun 30, 2015

The joystick on a game controller input will take focus away from what you're working on if the joystick is moved or set in an odd position. ...

Distances do not match on display 2.6 of the Math_Hall in ContentExamples

Docs - Samples - Sep 22, 2016

This could be a rounding error but if they are both representing the same distance they should match. Maybe truncating a few decimal places and rounding could work. ...

Visible line down center of asset in ContentExamples Cloth 1.6

Docs - Samples - Jan 18, 2017

This does not occur in 4.13.2 at CL 3172292 ...

Panning in blueprints does not appear to be affect by windows pointer speed

Tools - Nov 14, 2016

The windows mouse speed settings appear to have no effect on the panning speed in blueprint. ...

Passing array from blueprint to C++ causes performance drop

UE - Gameplay - Blueprint - Sep 8, 2015

Passing a blueprint array as an argument to a C++ function causes a spike in Frame rate, game and GPU. This spike is noticeable when using UnitGraph. Attached screenshots show difference in UnitGr ...