Unreal Engine Issues
Unreal Engine Issues
Some Niagara Fluid systems are not visible in a packaged project
UE - Niagara - Jun 7, 2022Previously packaging caused a crash with this system. This was fixed, but now the system is no longer visible when packaged. ...
Route gamepad to second window setting is broken
UE - Gameplay - Input - Nov 11, 2022The RemapControllerInput function call likely needs to be added back to the game viewport client as a fix. ...
Sky renders black after building lighting in VR Template
UE - Graphics Features - Jan 13, 2023Regression: Tested in UE5/Release-5.0 at CL 20979098, this issue does not occur so this is a regression. ...
WorldPartition: Attached Actors within Level Instances save level offset bounds
UE - World Creation - Worldbuilding Tools - Level Instances - May 9, 2023The proposed fix is implemented in CL 25389340 but needs further testing to make sure there are no issues caused by it. ...
CreatePatchLibrary is broken
UE - Rendering Architecture - Shaders - Nov 12, 2025It seems the FEditorShaderCodeArchive.LoadExistingShaderCodeLibrary missed some functions, use FEditorShaderCodeArchive.AddShaderCodeLibraryFromDirectory instead could fix the issue. ...
Local Vector variables in functions do not save the Y and Z values
UE - Gameplay - Blueprint - Mar 12, 2015Local Vector variables in functions do not save the Y and Z values. Possibly connected: after entering the X value, pressing Tab does not move to the Y value. Tabbing from there works as expected. ...
Alembic Importer does not import the correct amount of curves when using the Minimum Number Of Vertex Influence Percentage setting
UE - Gameplay - Jan 3, 2017This is a regression from 4.14.2 ...
AreaFlags Empty During First PIE Session After Hot Reloading
UE - AI - Dec 12, 2016AreaID always seems to be empty during the first PIE session after hot-reloading. Only able to test in Dev-Framework CL# 3221683 due to the licensee's project being created in 4.15 and not being b ...
Incorrect config property serialization for UStructs used as TMap keys or contained in a TSet with a single value. Diffs taken from default-value of each member type, instead of from default-value of the struct
UE - CoreTech - Nov 18, 2024Consider a UStruct with some basic type members, each one with a default value specified in the struct. Also consider a TSet or TMap with that struct as keys, used inside a UObject as a UProperty an ...
Creating a float variable named lifespan in an Actor Blueprint and setting its default value will override the life span of the parent class
UE - Gameplay - Blueprint - Dec 19, 2016Creating a float variable named lifespan in an Actor Blueprint and setting a default value for it will override the parent class' life span setting. I was unable to find any variable in the Actor cl ...