[Audio Analysis][Ensure] - Sound Submix Spectral Analyzer Delegate Throws Ensure when Analysis Started Before the Delegate is Added

UE - Audio - Nov 25, 2021

Hit the following Ensure when trying to use the Spectrum Analyser. Also hit this in 4.26 so it doesn't appear to be a regression. Occurs with any of the following Band Settings or when creating you ...

Metahuman Hair Physics becomes jittery when 32x Antialiasing is enabled in MRQ

UE - Anim - Sequencer - MRQ - Aug 15, 2023

Enabling 32x AntiAliasing on an MRQ causes metahuman hair physics to become twitchy in the image sequence output.  ...

[MetaSounds]- Attemping to copy and paste inputs between graphs can cause nodes with duplicate pins

UE - Audio - MetaSounds - Aug 15, 2023

Video example: [Link Removed] Occurs in 5.2 as well as 5.2. ...

Atmosphere Sunlight shafts, artifacts, for both cascaded and virtual shadow maps.

UE - Rendering Architecture - Feb 5, 2024

Very large objects casting dynamic shadows on the sky atmosphere can lead to flickering (cascaded shadow maps) or square patterns (virtual shadow maps). ...

Crazy camera when zooming in/out the Sequencer

UE - Anim - Sequencer - Mar 22, 2024

If you add Static Mesh (cube) in this Level Sequence and click on it in Sequencer, you can observe the Spline Path that the cube is following is changing its shape when keys in Sequencer are zoomed ...

Opening a Level inside the ReferenceViewer does not Prompt the Save window if the Level is dirty.

UE - Editor - Applied Usability - Apr 15, 2024

If you right click on a level node in the reference viewer and choose edit, it will bypass prompting you to save unsaved changes in your current level, silently discarding all unsaved work. ...

UE5.4 Regression - crash when disabling shader optimization while raytracing is enabled on D3D12

UE - Rendering Architecture - Shaders - Jul 15, 2024

Certain interactions between a Rect Light with a Light Function and a Post-Process volume lead to a check() when compiling a Ray Tracing PSO for tracing lights. This check() only happens when shader ...

Params in material instance disappear when grouping is changed in material with a material layer

UE - Rendering Architecture - Materials - Jan 11, 2025

If there is a texture parameter within a specific material attribute stream in the base material and also within the base material layer, they must have the same parameter group otherwise the parame ...

Shader Symbols not Generated for Windows Platform when r.Shaders.Symbols=1

UE - Rendering Architecture - Shaders - Feb 28, 2025

Shader symbols are not generated for the Windows platform. Attempts were made to set the r.Shaders.Symbols=1 value in the projects DefaultEngine.ini, the engines ConsoleVariables.ini and the engine ...

Dragging Marquee in Orthographic Views results in Selecting Unintended Objects

Tools - Mar 17, 2015

In an orthographic view, dragging the marquee tool to select a group of objects will often result in other objects being selected outside the selection area. ...