Unreal Engine Issues
Unreal Engine Issues
DiffuseIndirect_Lumen_3 parameter missing and causing crash with Screen Space reflections and Lumen Async Compute
UE - Rendering - Features - Lumen - May 3, 2025When 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 ...
Assertion trying to open packaged project on Linux: Default__MaterialInterface was listed as a fixed load order but was already processed
UE - Foundation - Core - Feb 20, 2017This might be related to [Link Removed]. ...
Matinee not triggering when moved from one level to another
Tools - Oct 19, 2015It 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, 2016The 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, 2017After 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 ...
DoNotCreateDefaultSubobject is not recognized when an actor is duplicated
UE - Foundation - Core - Mar 17, 2017Adding DoNotCreateDefaultSubobject to a class after placing an instance of that class in the viewport will fail to be recognized when duplicating the placed instance. This is not a hot reload issue ...
Backspace Key not activating when working with 3D Widgets
UE - Editor - UI Systems - Mar 27, 2017Backspace Key not activating when working with 3D Widgets and will not be called when working with the Widget Interaction component. User says they are having a similar problem with the enter key in ...
Crash promoting a float pin from a split vector in Anim Blueprint
OLD - Anim - Jun 7, 2017REGRESSION Yes, does not occur in 4.16. Crash occurs when the user splits a vector pin on an anim node and then tries to promote one of the float nodes to variable. I could not reproduce this issu ...
Map load stalls in texture streaming code
UE - Graphics Features - Jun 13, 2017A change was made to AActor.GetComponents which appends the results instead of resetting the output array. This seems to only impact 2 places in the code, and has a big side effect in the texture st ...
Yellow 'Revert to Default' arrow disappears when not on screen
Tools - Jul 20, 2017When a details value is changed, the yellow 'Revert to Defaults' arrow next to the changed value will vanish if the changed setting is scrolled off screen. This also prevents the arrow from reappea ...