Unreal Engine Issues
Unreal Engine Issues
MRG - Additional Post Process Render have a black alpha channel
UE - Virtual Production - Tools - MRQ - Feb 7, 2026Additional Post Process renders always have a black alpha channel ...
Uniform Static Mesh Sampling doesn't work on GPU Niagara Emitters
UE - Niagara - Aug 11, 2020Uniform sampling of static meshes for GPU emitters does not work. ...
Scrubbing Playback Speed under Geometry Cache in the details panel is too sensitive
UE - Gameplay - Sep 30, 2016Scrubbing Playback Speed is very sensitive and even a small mouse movement will cause playback speed to jump way too much. This makes it very hard to set it to smaller values and mostly a usability ...
Selecting other components after selecting a Spline Component's control point keeps the transform gizmo and functionality at the Spline Control point
UE - Editor - May 3, 2022Selecting other components after selecting a Spline Component's control point keeps the transform gizmo and functionality at the Spline Control point Repro Rate: 4/4 Tested this in //UE4/Release-4 ...
A sampling result of DistanceFieldAOHistory is shifted to a wrong position.
UE - Rendering - Graphics Features - Aug 21, 2024DistanceFieldAOHistory introduces ghosting at low scalability and low screen percentages. This can lead to AO artifacts and a ghosting effect from the character. This issue was also observed on //U ...
Adjusting play speed for animation causes notifies to trigger multiple times
UE - Anim - Sequencer - May 31, 2016Adjusting play speed for animation causes notifies to trigger multiple times. Creates a stuttering effect. ...
No Editor Audio on Linux when using ALSA
UE - Platform - Linux - Oct 31, 2017No sound play in editor when using ALSA (Advanced Linux Sound Architecture), and log spam when launching a project ...
Adding/Removing a Material Layer on a Parent Material doesn't propagate to Children correctly
UE - Rendering - Architecture - Materials - Jun 9, 2026When a Material Layer is added to or removed from a Parent Material the layer changes don’t automatically propagate to Child Materials correctly even if the Parent Material is saved. The Child mate ...
Lighting channels not working as expected when enabling Ray Tracing Shadow
UE - Graphics Features - Lumen - Oct 13, 2020Non-Ray Tracing Shadows are only cast from lights on meshes assigned to the same Lighting Channel. When enabling Ray Tracing Shadows this is not the case. Lights will still cast Ray Tracing Shadows ...
Live Coding Doesn't Appear to Correctly Reload or Reinit Automation Spec Tests
UE - Foundation - Cpp Tools - Live Coding - Dec 3, 2020Something in the way that live coding interacts with the test system, or how the tests are loaded at startup and initialized, isn't quite matching up. ...