Unreal Engine Issues
Unreal Engine Issues
UE5.6+ - Mutable - IDPrefix crash when combining Child Objects, Add to Mesh Component and Extend Mesh Section.
UE - Anim - Mutable - Jul 21, 2025So the issue seems to be a combination of Add To Mesh Component and Extend Mesh Section. I've tried this in Epic Launcher 5.6, 5.6 in-house modified engine as well as ue5-main 5.7 from git (editor ...
Difference in Shader Complexity view mode between Static Mesh and Painted Foliage Actors after Enabling 'Dbuffer Decals' in Project Settings
UE - Graphics Features - Oct 19, 2016The 'Shader Complexity' view mode is rendering differently between regular Static Meshes and Painted Foliage instances after enabling 'DBuffer Decals' The user is reporting that this does not seem ...
Post Process Material: different color behavior in Sequencer Render vs Movie Render Queue
UE - Anim - Sequencer - May 21, 2020During lookdev, I use a post process material to bring reference images into the engine to compare against my work. The goal is for the reference image to not be touched by any of the Unreal color ...
iPadOS AR App Crashes when ARKit's "Use Scene Depth for Occlusion" is Enabled
UE - Platform - XR - Dec 13, 2024Does not crash in 5.4 on same hardware so looks like a regression. Attached Unreal logs indicate source of critical error: 'FARKitCameraOverlayMobilePS' shader uniform expression set mismatched sh ...
Crash when importing material assigned to FBX with illegal characters through the Full Scene Importer
UE - Editor - Content Pipeline - Import and Export - Jun 21, 2016If you have an illegal character (/ or ?) in your material name embedded with your FBX the editor will crash when using the new Full scene importer and selecting the Materials Tab. Tested in and ...
Crash report window does not open on GitHub source builds
UE - Foundation - Core - CrashReportClient - Jun 13, 2016When using a source build of 4.12, the crash report client window does not open even if Crash Report Client is manually built alongside the editor. UPDATE: Only affecting Source builds from Github. ...
Actor Hidden in Game does not take lighting into account any longer
UE - Graphics Features - Jul 13, 2016Using indirect lighting from bounce cards that are set to Actor Hidden in Game no longer generate indirect lighting for the scene. This is a regression of 4.11.2 where this worked but is no longer ...
SunTemple Performance Regression on Galaxy S6 family devices.
UE - Platform - Mobile - Aug 17, 2016We encountered this issue while checking data for the Mobile Compat pass on 4.13. Galaxy S6 4.12 FPS/FR: 54/18.5 Galaxy S6 4.13 FPS/FR: 24/41 Galaxy S6 Edge 4.12 FPS/FR: 53/18 Galaxy S6 Edge 4.13 ...
Misaligned sampling in UI Material with with CustomStencil
UE - Editor - UI Systems - May 19, 2025The output of the CustomStencil node in a User Interface material does not align with the viewport dimensions. Toggling fullscreen/windowed mode (F11) causes the offset to reappear, so scaling the n ...
r.ScreenPercentage.Editor does not function
UE - Graphics Features - Jun 2, 2016Setting r.ScreenPercentage.Editor does not affect the upsampling/downsampling of the viewport in the editor. Regression: YES - the console command correctly adjusted the screen precentage in 4.11.2 ...