Color picker does not change the color of a Vector Parameter in a Material Instance until the mouse button is released

UE - Graphics Features - Mar 11, 2020

This is a regression from 4.23.1 (CL-9631420). The color picker does not update in realtime anymore when holding down the left-mouse button. Only on mouse-release does it update. This was reported ...

Exporting a UE4 Animation into Maya results in wrong skin weight

UE - Editor - Content Pipeline - Datasmith - Importer - Apr 21, 2020

UE4 Mannequin animations are not exporting/importing correctly into Maya. The right hand is bulkier and the left shoulder is dislocated. This was reported and tested in 4.23.1 (CL-9631420). this w ...

Key input by Sequencer is missing in FBX output of parent-child actors

UE - Anim - Sequencer - Nov 15, 2021

This problem did not occur in 4.27.0. Animation is not output when outputting a hierarchical structure. Actor(A)   ┗Actor(B)     ┗Actor(C) This is how the attachments are registered, and the ke ...

Platform-specific defines not picked up by Intellisense

UE - Foundation - Cpp Tools - UnrealBuildTool - Aug 31, 2022

With the way PLATFORM_XSX, PLATFORM_PS5 etc. are defined, it seems intellisense doesn't know about them, because the .vcxproj only references the Win64 version of Definitions.h, and they are defined ...

Precomputed AO Mask renders with value of zero after building lighting

UE - Rendering Architecture - Materials - Jan 13, 2023

Regression: Tested in UE5/Release-5.0 at CL 20979098, this issue does not occur so it is a regression.  This issue occurs in 5.1 for both normal light building and GPU Lightmass building. In 5.0 th ...

r.SupportPointLightWholeSceneShadows Set to False Causes Crash When Trying to Place a PointLight

UE - Graphics Features - Jul 25, 2018

If you disable Support PointLightWholeSceneShadows and try to place a point light in a level the editor will crash.  Current work around is put shadows to low from engine scalability settings. Wor ...

Shader Model 5 and Tessellation causes unintended effects on Linux

UE - Platform - Linux - Jul 6, 2016

Using Shader Model 5 and tessellation on Linux gives strange results that are not present when used on Windows ex: 1) When using Shader Model 5 on Linux, turning on Translucent blend mode and Tesse ...

Ctrl + z still active in PIE

Tools - Jan 20, 2016

Users can select ctrl + z while playing in Editor causing PIE to stop and undo last change, often freezing the editor temporarily, and sometimes causing a crash. Workaround: This does not occur if ...

PhysX errors when packaging for x86

UE - Platform - Mobile - Oct 27, 2016

Packaging for x86 in ETC1 will generate PhysX errors and cause the package to fail. The following error will occur multiple times throughout the package:UATHelper: Packaging (Android (ETC1)): Unrea ...

Broken references after renaming template default folders

Tools - Jan 17, 2017

When a template project's default folders are renamed (such as Geometry in the First Person Template), the original folder name is still shown in the content browser. Relaunching the project will s ...