Changing the name of a GameMode Blueprint that is set as the Default in Project Settings and then clicking the Project Settings Default GameMode dropdown will crash the editor

Tools - Jul 7, 2015

Changing the name of a GameMode Blueprint that is set as the Default in Project Settings and then clicking the Project Settings Default GameMode dropdown will crash the editor. No crash report is ge ...

Entering nine or more digits into a numerical field will change the value upon confirmation

Tools - Sep 9, 2016

If a value with nine or more digits is entered into a numerical field the number the last few digits will be converted to another number upon accepting input. This happens in blueprints as well as ...

Switching CanEverAffectNavigation on a Dynamic Obstacle Leaves Original Area Behind

UE - AI - Sep 15, 2016

When setting Can Ever Affect Navigation to false, moving it, and then setting it back to true, the originally affected area remains, and it also creates a new affected area. This occurs each time y ...

Unable to change View Options from the menu contained inside of an asset selection dropdown

Tools - Dec 16, 2016

Using the View Options option inside of an asset selection dropdown window does not work. None of the options, other than the Scale slider under Thumbnails, will make any changes and the window is i ...

world outliner does not hide attached actors when turning off visibility

Tools - Nov 29, 2017

When attaching actors via the world outliner, there is an issue occurring using the visibility option, actors attached via the world outliner do not follow the visibility of what they are attached t ...

Group movement distorts with scenes of different scale in actor blueprint

Tools - Dec 5, 2017

There is an issue with selecting multiple meshes that are children of different scenes when the scale is different than the default. moving the static meshes together causes them to move at differen ...

When OpenGL ES 3.1 is enabled for Android build in Handheld AR Template, camera inverts colors

UE - Platform - XR - Mar 26, 2018

When OpenGL ES 3.1 is enabled in Android Build settings, device prompts user to choose to "Allow ARInvertColor to take pictures and record video". If allowed, colors are inverted by the camera. If ...

Replay playback can become paused indefinitely after scrubbing with high time dilation

UE - Networking - Feb 19, 2020

When playing a replay with DemoPlayTImeDilation set to 5, and jumping around the timeline using GotoTimeInSeconds(), the play back can break, with game actors freezing and violently shaking. It seem ...

Lightmass ignores StaticSwitch in materialinstance

UE - Graphics Features - Aug 12, 2020

This is caused by FLightmassMaterialProxy doesn't have GetStaticParameterSet() function. (FMaterial::GetStaticParameterSet() is called.) It can be fixed by adding the following function to FLightma ...

UDIM UVs are wrong

UE - Graphics Features - Feb 19, 2020

UE4 applies 1-x transform to V coordinate when importing UVs from mesh. This is to handle GL/D3D differences in texture origin, but it breaks UDIM page addressing. It's possible to apply a fix to ...