Unable to save blueprint after Hot Reload that affects the class the blueprint is based on

UE - Gameplay - Blueprint - Sep 14, 2015

After hot reloading a project, if the class a blueprint is based off of was edited, the blueprint is unable to be saved due to being referenced in Engine/Transient. Project for Repro: [Link Removed ...

Separate Fill Alpha does not work on font outlines when outline size is set to 1

UE - Editor - UI Systems - Slate - Jan 16, 2017

Font outlines render underneath the text, meaning that partially transparent text will allow the outline color to show through. This can be avoided by enabling Separate Fill Alpha. However, that opt ...

Half precision is not supported for OpenGL ES 3.1 Pixel Shaders

UE - Platform - Mobile - Apr 6, 2018

Fix the cross compiler so half precision is supportedAdd a project setting to specify the default precision to support on ES31. Be sure the shader version takes this setting into account. — User des ...

BP-implemented BT decorator issues with 4.6 to 4.7 upgrade

UE - AI - Jan 20, 2015

Changes done to BTDecorator_Blueprint result in users not being able to upgrade their BP-implemented decorators to 4.7. ...

Cannot Package Game for Windows from External Drive on Windows 8.1 Boot Camp Mac

UE - Foundation - Core - Dec 17, 2014

User is trying to package the xixoBerlinFlat Marketplace and cannot get a packged project from an external drive project on a Windows 8.1 x64 system running via Bootcamp on a Mac. ...

Opening or Creating a Material with SubSurface Profile will Crash Editor with LPV enabled

UE - Graphics Features - Dec 22, 2014

After enabling Light Propagation Volumes with the console variable r.LightPropogationVolume=1, opening or creating a material with the subsurface profile model will crash the editor. Broken in 4.6. ...

Manually changing the value for Constraint Value 1 & 2 causes odd visual issues

UE - Simulation - Physics - Jun 1, 2016

Changing the values that govern what bones a constraint is suppose to be a joint between (Constraint Bone 1 & 2) will cause issues where the transform widget is moved to an appropriate location but ...

When switching versions of UE4 the folder colors do not migrate with the project

Tools - Feb 27, 2015

User reports when creating a project and changing the folder colors in 4.6, then opening the project in 4.7/4.7.1, the folders go back to their default color. Users have also reported this happenin ...

Compiling with VS2019 16.6 later causes garbled characters in output window

UE - Foundation - Cpp Tools - UnrealBuildTool - Nov 10, 2020

Using old behavior by applying true to NMakeUseOemCodePage property solves this issue.  in VCProject.cs​// Project globals (project GUID, project type, SCC bindings, etc) { VCProjectFi ...

Debugging Motion Matching in 5.1, looping animations don't loop root correctly

UE - Anim - Gameplay - Jan 31, 2023

Just trying a few simple animations in 5.1, I have a few short looping cycle animation that go in different directions. I see very bad results and it looks like it's because of how MM is assuming th ...