GetAllocatedSize returns inaccurate number of bytes

UE - Foundation - Core - May 20, 2015

When calling GetAllocatedSize() on a TBitArray it will round down the result of MaxBits / NumBitsPerDWORD. This means that not enough bytes are allocated when the MaxBits is not divisible by NumBi ...

UMG Throbber is not showing in project when using 'Set Number of Pieces' node off of Event tick

UE - Editor - UI Systems - Apr 22, 2015

If you add a throbber to a UMG Blueprint and use the Graph of the Blueprint to change the 'Set Number of Pieces' and use 'Event Tick' to tick the widget, the throbber widget will not appear on scree ...

Physics Asset doesn't follow the Skeletal Mesh when Physics Blend Weight is set to any value between 0 and 1

OLD - Anim - Feb 9, 2017

Physics Asset doesn't follow the Skeletal Mesh when Physics Blend Weight is set to any value between 0 and 1. Could be related the the fix for this JIRA: https://jira.it.epicgames.net/browse/UE-192 ...

Xcode 8.3.2 fails to successfully build 4.15.1 from source code

UE - Platform - Apple - May 2, 2017

Attempting to build 4.15.1 from source code using Xcode 8.3.2 currently results in the build failing due to warnings that occur in fbxsdk, AlembicImporter, and MetalRHI. ...

Importing skeletal meshes with uniform scale >1 causes rotation in skeletal mesh editor to improperly register

OLD - Anim - May 11, 2015

If a skeletal mesh is imported with a uniform scale of >1, the rotation feature in Persona will not rotate bones at the proper ratio. The meshes rotation will slow down as the uniform scale increase ...

"Working with Components on Actors Part 1" mentions incorrect behavior about adding component replaces root

Docs - Jul 18, 2017

In the Blueprints > Working with Components on Actors Part 1 tutorial, there are steps that say that when placing a component in an empty actor, it will replace the root component. This is old beha ...

Noise Material Expression is rendering outside Min and Max Range with High Position Values

UE - Graphics Features - Mar 31, 2015

The Noise Material Expression is rendering values well outside the Min and Max Range set in the Expression node. Also Reproduced in Main Promotable-CL-2469752 Alerted the user to suspicions and su ...

Skeletal Meshes do not work properly on Open GL ES 3.1 on Xiaomi Redmi 6

UE - Platform - Mobile - Oct 30, 2018

Skeletal meshes do not render or animate properly on the Xiaomi Redmi 6 (PowerVR GE8320) when using OpenGL ES3.1. This issue changed a bit from 4.19 to 4.20. In 4.19, the skeletal mesh seems to of ...

DDX and DDY no longer work properly close to the camera in 4.21 on Android in OpenGL ES 3.1

UE - Platform - Mobile - Mar 29, 2019

DDX and DDY no longer work properly close to the camera in 4.21 on Android in OpenGL ES 3.1.  Worked in 4.20, no longer works in 4.21 or 4.22.  Originally reported as Oculus Quest specific, but repr ...

Externally Referenced error is produced after cloning a 4.6.1 project and converting it to a 4.7.6 project

UE - Foundation - Core - May 13, 2015

A User in unable to save there project because of they get warnings for all of the objects in their scene saying they are externally referenced. This happens after cloning a project and then convert ...