Sorting a Blueprint variable into a subcategory separates variables into separate category structures

UE - Gameplay - Blueprint - Oct 14, 2019

Within the Blueprint Editor, it is possible to create subcategories for variables to be sorted into. Doing so separates variables not nested into subcategories out into standalone, top-level structu ...

Inventor Assembly imports incomplete or missing geometry

UE - Editor - Content Pipeline - Datasmith - Importer - May 22, 2020

It seems that UE4 has a problem with importing Inventor Assemblies and Subassemblies. Files are either the wrong orientation or missing their geometry completely. This was reported and tested in 4 ...

Naming a variable 'LifeSpan' causes the default value to be reset after closing the editor

UE - Gameplay - Blueprint - Nov 3, 2020

Customer reported this issue in Salesforce. I repro'd this issue in 4.25.3, 4.25.4, and 4.26. Therefore marking it as not a regression. Renaming the variable something like "LifeTimer" does not res ...

RGB/UINT10 HDR Format not using ST.2084

UE - Rendering Architecture - RHI - Aug 23, 2021

Specification here: [Link Removed] Which is mirrored in engine in FD3D12DynamicRHI::Init (for example): [Image Removed] However, FWindowsPlatformMisc::ChooseHDRDeviceAndColorGamut always returns ...

Source Textures used with a Rect Light are blurry and diffused

UE - Graphics Features - Mar 14, 2023

This is a regression from 5.0.3 tested in the following streams:BranchChange ListResults//UE5/Release-5.020979098Did not reproduce//UE5/Release-5.123901901Reproduced//UE5/Release-5.224608918Reproduc ...

DiffuseIndirect_Lumen_3 parameter missing and causing crash with Screen Space reflections and Lumen Async Compute

UE - Graphics Features - Lumen - May 3, 2025

When the Reflection Method is set to Screen Space and Lumen reflections async compute is enabled Unreal will crash because DiffuseIndirect_Lumen_3 parameter missing, due to how DenoiserOutputs are o ...

Matinee not triggering when moved from one level to another

Tools - Oct 19, 2015

It appears that if you create a Matinee in a Sublevel, and then subsequently move the matinee between levels. It will not keep associations with the attached actors in the Matinee and not trigger e ...

Editor crashes sporadically in OSX 10.12

UE - Platform - Apple - Oct 27, 2016

The editor is crashing sporadically in OSX 10.12. I have just started hitting this crash ~ 3-4 times a day usually when opening a new tab of some sort in the Mac editor Looking at the various repo ...

Enabling "Support Deferred Rendering with Metal" Crashes on IOS device

UE - Platform - Mobile - Feb 8, 2017

After enabling "Support Deferred Rendering with Metal" and then launching to an IOS device (in this case iphone 6+) the game will no longer open and run. REGRESSION? Yes Worked in Binary 4.13.2 C ...