Level Blueprint's Parent Class can be set to another Level Blueprint's generated class

UE - Gameplay - Blueprint - Sep 16, 2015

You can assign the Parent Class of Level Blueprint to be the generated class of another Level Blueprint, which gives you the following "Graph is linked to object(s) in external map" error if you try ...

Packaging a plugin from Plugins Editor UI wipes the target folder before packaging

UE - Foundation - Cpp Tools - Plugin System - Sep 23, 2016

"Package Plugin" from Plugin Editor UI will wipe the target folder’s contents first then populate it with plugin files. User was expecting “Package Project” like behavior: Create a new folder in th ...

Html5 packaging fails on Windows if the user has HOME env var

UE - Platform - Mobile - Oct 3, 2016

If user has HOME env var, Html5 packaging creates .emscripten folder within the location specified by HOME, not the expected intermediate location(like C:\Program Files\Epic Games\4.13\Engine\Interm ...

Root Motion (RMFE) - Blend with cached pose causes inaccurate root motion

UE - Anim - Gameplay - May 28, 2015

With Root Motion From Everything enabled, a Blend node gives different results when feeding it Animation Sequences directly or when first using a Cached Pose. *Simple test project attached Two sce ...

Overriding a static parameter in a material instance but not changing the value unnecessarily duplicates shader code

UE - Graphics Features - Sep 9, 2015

When you have a Material with a static parameter and an Instance of that Material that has the "override" checkbox checked for that static parameter, but has the value set to the same value as the p ...

ShaderComplexity doesn't work correctly with ScreenPercentage

UE - Graphics Features - Apr 20, 2016

ShaderComplexity doesn't work correctly with ScreenPercentage Original(ScreenPercentage: 83.33)[Image Removed] ShaderComplexity[Image Removed] ...

Crash: Using Sequencer to attach an actor with multiple skeletal mesh components crashes the editor

UE - Anim - Sequencer - Nov 30, 2016

When using an Attach track in sequencer to attach an actor that contains more than one skeletal mesh component, the UI to choose which mesh component to attach to pops up, but then the editor hangs ...

Crash: Changing Material Property Overrides of Material Instance

UE - Graphics Features - Dec 14, 2016

When a material has a static bool parameter AND this is overridden in a material instance, Trying to change Blend Mode or Shading Model under the Material Property Overrides crashes the editor. Thi ...

ScreenAlignedUVs does not handle opengl space properly

UE - Graphics Features - Jul 5, 2017

ScreenAlignedUVs does not handle OpenGL space properly. There are differences in Metal and OpenGL window coordinates, so it works correctly for iOS and not for OpenGL. ...

Hard reference gets created by adding a retarget source to a skeleton

OLD - Anim - Aug 18, 2017

Adding a retarget source to a skeleton would create a hard reference from the skeleton to the mesh(retarget source mesh). ...