Unreal Engine Issues
Unreal Engine Issues
Assertion thrown while creating a Geometry Collection with Hardware Raytracing enabled along side r.RayTracing.Geometry.GeometryCollection 1
UE - Graphics Features - Apr 26, 2022A raytracing project with hardware raytracing enabled and r.RayTracing.Geometry.GeometryCollection set to 1 triggers a crash when trying to create a geometry collection. ...
Cooked materials and material instances size have doubled when upgrading from 5.1.0 to 5.2.0
UE - Rendering - Architecture - Materials - Jul 18, 2023UDN: [Link Removed] A UDN customer has observed that their cooked materials have doubled in asset size going from 5.1 to 5.2. We need to investigate this is only a local issue on their side and no ...
When OpenGL ES 3.1 is enabled for Android build in Handheld AR Template, camera inverts colors
UE - Platform - XR - Mar 26, 2018When OpenGL ES 3.1 is enabled in Android Build settings, device prompts user to choose to "Allow ARInvertColor to take pictures and record video". If allowed, colors are inverted by the camera. If ...
Jittering appears when setting DOF in ES3.1
UE - Platform - Mobile - Oct 5, 2021For reference, it was fine in 4.24 In particular, jittering is severe when the camera is moving. GaussianHalfRes has been removed in CL 14036168, which is likely to cause degradation issues if int ...
4.6.1 to 4.7 conversion crash "Assertion failed: Pin != nullptr ...K2Node_DynamicCast.cpp]"
UE - Gameplay - Blueprint - Feb 25, 2015Several Users are experiencing crashes on importing a 4.6.1 project into 4.7.0 (Release) Here are the crash reporter links: [Link Removed] [Link Removed] [Link Removed] [Link Removed] [Link Removed ...
Fix pause flags when recycling sound sources
UE - Audio - Dec 12, 2016Issue is due to pause flags getting recycled when new sound sources are used from the sound source pool. This is a regression since 4.13, causing audio to pop. ...
Build crash when enabling r.CreateShadersOnLoad=1
UE - Rendering - Architecture - Shaders - Nov 10, 2025When "r.CreateShadersOnLoad" is enabled, cooking will crash due to failure to create a shader. This occurs on //UE5/Release-5.5, CL: 41545209 and //UE5/Release-5.6, CL: 45232827 ...
FMassMoveTargetFragment::CreateNewAction does not update PreviousAction, breaking the start-of-path avoidance fade and related behavior for MassEntity crowds
UE - Runtime - Character - Jul 28, 2026In MassEntity-based crowds, when an agent transitions from Stand to Move and begins walking, the Avoidance trait parameters StartOfPathDuration and StartOfPathAvoidanceScale, which are meant to temp ...
Background blur missing with HDR CompositeMode 1
UE - Graphics Features - Jul 29, 2021UPD: According to Affects Version field, issue reproduces in 4.26, Regression for 4.27 - No. ...
Backout attempted fix for - AutoSize triggers ensure on shortened Skel Anim Section moved past anim length
zComponent - Archive - May 29, 2026In Sequencer, calling "Edit > Auto Size" on a UMovieSceneSkeletalAnimationSection triggers the LowerBound > UpperBound ensure in UMovieSceneSection::SetRange (MovieSceneSection.h:333) when the secti ...