Complex Collision as Simple causes odd Overlap behavior

UE - Simulation - Physics - Jan 25, 2016

When triggering overlap events with a Static Mesh using Complex Collision as Simple, the overlap Begin and End events will be triggered rapidly in sequence. Changing to Default collision will fix t ...

Delta applied twice when moving parent and grouped child actors

UE - Gameplay - Apr 8, 2016

When some grouped actors are childed to another actor, and both the group and the parent are selected in the world outliner, movement delta is applied twice to the grouped children. Code for a poten ...

Importing skeletal mesh with LODs and no animations generates additional skeleton and physics assets

Tools - Jan 13, 2017

Does not occur in 4.14.3 binary or 4.16 perforce. Occurs in both P4 and Binary builds of 4.15. Only occurs with Import Mesh LODs enabled and Import Animations disabled. ...

Data only blueprints are not not nativized when flagged to do so

UE - Gameplay - Blueprint Runtime - Jan 25, 2017

Data only blueprints that are explicitly flagged for nativization do not nativize. (Makes sense that they don't when they're not explicitly told, but if someone goes out of the way to flag them to, ...

Collision Meshes Are Ignored Until FBX Is Reimported

Tools - Feb 20, 2017

When importing a mesh with it's collision geometry and its LOD meshes all contained within the same group it won't import the collision geometry correctly. This can be fixed by simply right clicking ...

Material Slot Names Get Replaced With "None" After Merge Actors Operation

Tools - Mar 23, 2017

After merging two actors the resulting merged actor's slot names will be replaced with "none". Fixing this is a very tedious process for our licensee since there usually is a large amount of slot ...

KiteDemo: Bookmark spawn function broken if in Run mode

Docs - Samples - May 4, 2017

While testing in KiteDemo - //UE4/Release-4.16 CL 3420042 in Binary – I found that pressing the bookmark attraction Scene keys (1 - 0) does not work as intended if user is in Run mode. ...

Keying the Spawned Property of a Spawnable Breaks in the details panel

UE - Anim - Sequencer - May 18, 2017

The spawnable mesh seems to be breaking when their spawned property is altered. If you uncheck the spawned property in Sequencer, the Details panel also breaks similar to keying the property. This ...

Datasmith imports glossiness Texture as a Normal Texture

UE - Editor - Content Pipeline - Datasmith - Exporters - Sep 6, 2018

The Datasmith Importer for 4.20 (4.20E2) imports Glossiness Textures as Normal Maps. This is a regression from 4.19.2 (0.182) as Glossiness Textures were imported as World Textures ...

Private lobbies cannot be invited to on Steam

UE - Online - May 13, 2019

The old method doesn't work with private match invites as it doesn't have the right security permissions. It's still valid for dedicated servers. It also doesn't work properly with lobbies on VR eit ...