In the DragForce module drag amounts greater than one can accelerate the particle instead of slowing it down.

UE - Niagara - Jun 10, 2019

Drag force allows for values greater than 1, which can cause the drag force to exceed the initial velocity, which will continue to compound until a NaN is reached or the particle's lifetime is up. ...

USD Stage is not available on Mac and Linux

UE - Editor - Content Pipeline - Import and Export - Dec 17, 2019

On Mac and Linux the option to open the USD Stage window is not there like it is on Windows. This is not a regression since USD Stage was not preset in 4.23.1 (CL-9631420) on any platform. ...

Size input box too narrow in UMG Widget Editor

UE - Editor - UI Systems - Jan 24, 2022

Only 2 digits are visible in the size box that holds values between 1.0 and 0. Meaning most values will contain 3 digits. This is different from UE4 where more digits are visible. ...

Compile 'Note' on BP Interface events

UE - Gameplay - Feb 23, 2017

Compile 'Note' on BP Interface events. It happens in actor BPs and also BP Widgets. A similar issue was fixed back in 4.11 with Custom Events. Could be related? https://jira.it.epicgames.net/brows ...

LODGroup in Static Mesh not properly set when cancelling confirmation

Tools - Jul 8, 2015

LOD Group is not properly set when changing the setting in the static mesh editor. When the LOD Group is changed and the confirmation of overwrite message is cancelled it will still set the LOD Grou ...

Adding a code class derived from AnimInstance to a project created using the code Vehicle template will cause the Visual Studio build to fail.

UE - Gameplay - Dec 1, 2014

Adding a new code class derived from AnimInstance will cause the Visual Studio build to fail in a project based on the code Vehicle template. The build errors indicate that there are problems in the ...

Avoidance Groups Not Being Properly Set

UE - AI - Jun 29, 2016

Setting the avoidance group using the Set Avoidance Group node does not set the value of the group selected to true inside of the Avoidance Group struct. ...

Color shifting occurs from screen probe gather ping-pong when Lumen active

UE - Graphics Features - Lumen - Apr 29, 2024

A subtle yellow tint color shift occurs when Lumen is active due to usage of R11G11B10_Float targets, mostly from r.Lumen.ScreenProbeGather.SpatialFilterProbes where we ping-pong between R11G11B10_F ...

ShooterGame player death creates Death Anim Timer handler incorrectly

Docs - Samples - Mar 10, 2015

In ShooterCharacter.cpp (line 376) there is a call to FMath::Min(0.1f, DeathAnimDurtation) that always returns 0.1. User suggests changing FMath::Min() to FMath::Max(). ...

Access violation - code c0000005 (first/second chance not available)

UE - Foundation - Core - Feb 4, 2015

Crash Reporter: [Link Removed] Opening a project created in 4.6.1 with 4.7 built from GitHub branch 20150203 (last commit: 5bac1375be31053932c7b9123cc3bb94c70dd5e0) results in crash. ...