Unreal Engine Issues
Unreal Engine Issues
The default scene root of an blueprint actor is not removed after adding a static mesh component via C++ until after restarting the project
UE - Gameplay - Jun 27, 2019The default scene root of an blueprint actor is not removed after adding a static mesh component via C++ until after restarting the project (or reloading the blueprint asset) Found in 4.22 CL#70536 ...
Editor Crashes when Isolating a Material Element on Skeletal Meshes with Ray Tracing Enabled
UE - Graphics Features - Lumen - Jul 3, 2019With ray tracing turned on, clicking on the isolate material option next to a material slot on a skeletal mesh with more than one material slot, causes the editor to crash. Found in 4.22 CL# 7053647 ...
Material Parameter Collection Values not Updating in Simulate if "Run Dedicated Server" is Checked
UE - Networking - Jul 15, 2019Material Parameter Collection Values not Updating if "Run Deadicated Server" is Checked Working as expected in 4.21 CL# 4753647 Found in 4.22 CL# 7053642, 4.23 Preview 1 CL# 7236301, and 4.24 CL# ...
Sorting a Blueprint variable into a subcategory separates variables into separate category structures
UE - Gameplay - Blueprint - Oct 14, 2019Within the Blueprint Editor, it is possible to create subcategories for variables to be sorted into. Doing so separates variables not nested into subcategories out into standalone, top-level structu ...
Inventor Assembly imports incomplete or missing geometry
UE - Editor - Content Pipeline - Datasmith - Importer - May 22, 2020It seems that UE4 has a problem with importing Inventor Assemblies and Subassemblies. Files are either the wrong orientation or missing their geometry completely. This was reported and tested in 4 ...
Naming a variable 'LifeSpan' causes the default value to be reset after closing the editor
UE - Gameplay - Blueprint - Nov 3, 2020Customer reported this issue in Salesforce. I repro'd this issue in 4.25.3, 4.25.4, and 4.26. Therefore marking it as not a regression. Renaming the variable something like "LifeTimer" does not res ...
RGB/UINT10 HDR Format not using ST.2084
UE - Rendering - Architecture - RHI - Aug 23, 2021Specification here: [Link Removed] Which is mirrored in engine in FD3D12DynamicRHI::Init (for example): [Image Removed] However, FWindowsPlatformMisc::ChooseHDRDeviceAndColorGamut always returns ...
Source Textures used with a Rect Light are blurry and diffused
UE - Graphics Features - Mar 14, 2023This is a regression from 5.0.3 tested in the following streams:BranchChange ListResults//UE5/Release-5.020979098Did not reproduce//UE5/Release-5.123901901Reproduced//UE5/Release-5.224608918Reproduc ...
Crash when force deleting Dataflow Graph
UE - Editor - Jul 31, 2023When force deleting a dataflow graph with the dataflow graph editor open it will crash the engine. This issue is occurring in Binary //UE5/Release-5.3 @ CL 26560699 This issue is occurring in Binar ...
DiffuseIndirect_Lumen_3 parameter missing and causing crash with Screen Space reflections and Lumen Async Compute
UE - Graphics Features - Lumen - May 3, 2025When the Reflection Method is set to Screen Space and Lumen reflections async compute is enabled Unreal will crash because DiffuseIndirect_Lumen_3 parameter missing, due to how DenoiserOutputs are o ...