Unreal Engine Issues
Unreal Engine Issues
Editor 'Build All Levels' discards Volumetrics Lightmaps in persistent level
UE - Graphics Features - May 14, 2025Building the level or lightmaps can clear the volumetric lightmap. In 5.5, this requires you to perform a full build, or a lighting only build with a BSP brush in the scene. In 5.6, all level build ...
UE4Editor does not start when there are no audio devices available
UE - Platform - Linux - Sep 26, 2018UE4Editor does not open when there are no audio input or output devices available. The editor hangs at 83% after it initializes the AudioMixer. This issue looks like it was caused by CL 4396954. Et ...
A crash can occur during a batched compile of inter-dependent Blueprint assets via commandlet.
UE - Gameplay - Blueprint - Feb 20, 2021Bulk compiling more than one Blueprint class asset without incurring a garbage collection pass in between each compile can result in a crash during reference replacement, as serialization may end up ...
RPCs can still be called on torn off actors
UE - Networking - Apr 25, 2023Because UNetDriver::ProcessRemoteFunction does not check if the actor has been torn off, it's possible for the server to send a RPC for a torn off actor if it still exists on the server and client. ...
Details Panel - ShowOnlyInnerProperties does not work in nested structs unless the outer struct also has the metadata
UE - Editor - Workflow Systems - Nov 27, 2023The current implementation for inlining struct members is setup in a way where we start with the outermost struct and only recurse into any child structs if it contains the ShowOnlyInnerProperties m ...
Skeletalmesh editing can be slow when asset have a lot of morphtarget
UE - Editor - Mar 3, 2020After investigation, the asset is not rebuild, what took time is the 2 following partThe serialization of the DDC where we have to initialize the morph targetsE:\P4\main\Engine\Source\Runtime\Engine ...
Editor crash when deleting a outline folder with subfolders and using context menu
UE - Editor - Workflow Systems - Oct 3, 2023A user has reported that when using the Scene Outliner in a large map that has many actors and nested folders in the Outliner, deleting a folder that has subfolders from the Scene Outliner with Dele ...
Crash occurs when entering r.GbufferFormat 3 and running the Pixel Inspector Tool
UE - Graphics Features - Jun 13, 2017A crash occurs when attempting to run the Pixel Inspector tool after entering 'r.GbufferFormat 3' What this does is defines the memory layout used for the GBuffer. (affects performance, mostly thro ...
Crash Occurs when using the FreezeRendering Console Command in a Packaged Win64 Project
UE - Graphics Features - Jun 15, 2017A crash occurs when entering the console command, 'Freezerendering' in a packaged Windows 64 bit project. The freezerendering command is used for debugging and performance purposes. An interesting ...
Crash: Unhandled exception UE4Editor_Renderer!FMobileBasePassMeshProcessor::Process
UE - Graphics Features - Mar 14, 2019HUD can cause a crash when used with Mobile. "When running from visual studio exception happens here: https://github.com/EpicGames/UnrealEngine/blob/4.22/Engine/Source/Runtime/Renderer/Private/Mobi ...