Collision Channel on Particle Systems not saving

UE - Graphics Features - Oct 21, 2014

Setting the Collision Channel to anything other than World Static will reset on closing and restarting the editor. ...

Crash upon attempting to compile a blueprint while Git source control is active

If a user connects to source control through the Git plugin and creates a repository, when they try to compile a blueprint, they can sometimes crash ...

Networked Root Motion Sources can experience desynchronisation that is not present in animation root motion under forced adjustment

UE - Gameplay - Player Movement - Feb 13, 2024

In a networked environment with high packet loss (or high forced adjustment factor), motion applied using Root Motion Sources can desynchronise under conditions that animation root motion does not. ...

Removing Pose from Blend by Enum causes compile error with float defining blend time

OLD - Anim - Sep 16, 2015

Removing Pose from a Blend by Enum node can cause compile errors when a float is defining all of the blend times. ...

ForEachLoop doesn't iterate through all of the actors returned by the Get Overlapping Actors node

UE - Gameplay - Blueprint - Apr 10, 2015

ForEachLoop doesn't iterate through all of the actors returned by the Get Overlapping Actors node. Note: You can workaround this issue by adding the overlapped actors to an array and then looping t ...

Default values specified for local BP variables of type DateTime and Timespan don't actually work

UE - Gameplay - Blueprint Runtime - Nov 6, 2020

Have attached examples of this in action, including breakpoints showing the FDateTime::Ticks count as zero. Also showed that this is an issue for the existing GetYear/GetMonth/GetDay methods (and an ...

Using Tortoise SVN causes the engine's source control to be inconsistent

Tools - Jun 16, 2015

If a user decides to use Tortoise SVN, the error messages given for needing to have things checked out is inconsistent. If there is a blueprint which references another blueprint, and the reference ...

ARKit portrait image aspect ratio incorrect on iPhone 6s,7, probably all phones.

UE - Platform - XR - Nov 29, 2017

As described in this UDN thread, the iPhone 7 manifests incorrect image aspect ratiohttps://udn.unrealengine.com/questions/403841/ios-arkit-portrait-mode-stretching-on-iphone-7.html [Link Removed] ...

Differences in DistanceToNearestSurface and DistanceFieldGradient results between 4.27 and 5.0

UE - Graphics Features - Apr 27, 2022

In the UE5 case, we end up seeing very harsh lines in both the gradient and the distance to nearest surface examples whereas the results in 4.27 appear smooth.  It was also interesting to observe c ...

FKConvex::ElemCalcAABB ignoring current transform.

UE - Simulation - Physics - Apr 15, 2016

FKConvexElem::CalcAABB was ignoring the elements currently defined transform, and only scaling. This means that any actor that has a transform (not just Merge Actors) could potentially have very dis ...