Unreal Engine Issues
Unreal Engine Issues
Crash when changing r.MaterialQualityLevel when FastGeo plugin enabled in cooked build
UE - World Creation - Worldbuilding Tools - Sep 5, 2025The engine crashes when the r.MaterialQualityLevel is changed in a cooked game that uses the FastGeo Streaming Plugin. The crash doesn't repro with the same steps in Editor, just in a cooked build. ...
Debug Helpers no longer drawn indefinitely if life time is set to 0 or less
UE - Graphics Features - Sep 10, 2018Setting the lifetime for one of the visual debug helpers (a sphere was used in the repro, but the results should be similar for any of the debug helpers) to a value of 0 or less should make the debu ...
(GAS) Block tags are ignored in version 5.5.2 if two abilities share the same parent tags structure.
UE - Gameplay - Gameplay Ability System - Feb 5, 2025Block tags are not working correctly in version 5.5.2, it was working in 5.5.1. This is caused by a change done in version 5.5.2. The exact CL is: CL 35930696 ...
Raytraced reflection doesn't work with high roughness
UE - Graphics Features - Lumen - Oct 30, 2020Even when the max roughness for raytraced reflections is set to 1, they seem to be blended away at far below that value. For projects (e.g. film,vfx) where quality trumps speed it would be valuable ...
Virtual Memory leak when using specific rendering settings in the template project
UE - Rendering Architecture - Dec 20, 2025When a project is run with these settings in a template project, untracked virtual memory increases. Cvars r.GBufferFormat 3 r.Lumen.TraceMeshSDFs 1 r.Lumen.TranslucencyReflections.FrontLayer.Enab ...
Editor crashes when right clicking .csv data table
UE - Gameplay - Dec 24, 2014Right clicking a csv data table in content browser crashes editor. Frequency: 3/3 CrashReporter: [Link Removed] Callstack: MachineId:4E82586D46B558EA69EF0EAA821297B1 EpicAccountId:1558531203f8 ...
Destruction mesh with Crumble Smallest and Impact near another will leave residual mesh visible
UE - Simulation - Physics - Destruction - Jan 28, 2015When using a DM that has Crumble Smallest and Impact damage enabled there will be instances where the residual mesh before fracture is left behind. What appears to happen is there is a force large e ...
Getting Relative Location of an Object That Once Simulated Physics Returns World Location
UE - Simulation - Physics - Dec 10, 2015Attempting to get the Relative Location of a component that once simulated physics, but has been dynamically set at runtime to not simulate physics returns the World Location instead until the actor ...
Crash while using Geometry Scripting to add an Array of Vector 2D data to 'Append Buffers to Mesh' node UV0 input pin
UE - Graphics Tools - Modeling Tools - Jun 13, 2022Geometry Scripting plugin isn't available for 4.27.2, and the behavior is the same 5.0.1. Crash while using Geometry Scripting to add an Array of Vector 2D data to 'Append Buffers to Mesh' node UV0 ...
Sound Track in Matinee Ignoring Track Location and Playing Audio at Beginning of Sound Wave/Cue
Tools - Sep 22, 2015When scrubbing the Matinee handle with a Sound Track added, no matter the location of the handle, the sound wave associated will play from the beginning of the audio file. Tested in 4.8.3 - 2634408 ...