Garbage Collection Causes Lag in MAC Project

UE - Foundation - Core - Sep 18, 2015

User reports lag regardless of the Garbage Collection settings, EXCEPT: If the user changes settings to 3 then lag becomes more frequent (approximately every 3 seconds verses every 5 seconds.) *Wa ...

Post Process Material: different color behavior in Sequencer Render vs Movie Render Queue

UE - Anim - Sequencer - May 21, 2020

During lookdev, I use a post process material to bring reference images into the engine to compare against my work.  The goal is for the reference image to not be touched by any of the Unreal color ...

Handheld AR On IPad Has Dark Contrast Issues And Constant Screen Tearing When Mobile HDR Is Disabled

UE - Platform - XR - Mar 4, 2020

When MobileHDR is disabled in a packaged AR project for iOS there is a big constrast with the brightness in the image and constant screen tearing. This is happening specifically with images captured ...

Blueprint Tooltips Appear Behind Contextual Menu

Tools - Nov 30, 2015

On an iMac running OSX 10.11.1 a user reports that the tooltips are appearing behind the contextual menu. *See image ...

Use Single Process settings adjusted while Use Single Process is disabled are retained while Use Single Process is enabled

UE - Networking - Jul 1, 2015

Use Single Process settings adjusted while Use Single Process is disable are retained while Use Single Process is enabled. This can be problematic when there are issues with having Use Single Proces ...

Misaligned sampling in UI Material with with CustomStencil

UE - Editor - UI Systems - May 19, 2025

The output of the CustomStencil node in a User Interface material does not align with the viewport dimensions. Toggling fullscreen/windowed mode (F11) causes the offset to reappear, so scaling the n ...

Adding ProceduralMeshComponent Class to a project prevents the code from compiling

UE - Gameplay - Aug 5, 2016

After adding a classed based on ProceduralMeshComponent the code for the project does not compile any longer. **This is a Regression - Adding ProceduralMeshComponent class would compile successfull ...

Find Collision UV Returning Unexpected Values

UE - Gameplay - Jan 19, 2017

Find Collision UV is returning values that are above 1.0, when it is expected that these values would remain between 0 and 1. ...

Dynamic Shadows are not working when deployed to a mobile device

UE - Platform - Mobile - Dec 22, 2014

When deploying a Third Person Template project to a Mobile device, there will be no dynamic shadows in the level coming from the character. Shadows are shown in 4.6.1 but not in the changelist provi ...

Moving a Copy of an Actor from Persistent to Sublevel Dirties Persistent Level

Tools - Aug 18, 2017

Using Alt-Drag to move a copy of an actor from the persistent level to a sublevel (when the sublevel is selected as the current level in the Levels window), the persistent level is getting marked as ...