Unreal Engine Issues

Tick functions are skipped on the first frame in package build and standalone PIE

It's reported that all Tick functions are skipped on the first frame when running in packaged builds and standalone PIE. This is because both TickVisitedGFrameCounter and GFrameCounter are initializ ...

Cascade - Some Delayed Particle Emitters Don't Function with High Delta Times

This is a Cascade issue from a UDN where single loops can be skipped if the DT is high enough. ...

Reference Viewer doesn't show references to Primary Asset IDs

Context Reference Viewer can be used to view references between assets. There is a setting 'Show Management References' whose tooltip implies that references via PrimaryAssetID should be findable t ...

FInstancedStruct and TInstancedStruct in DeveloperSettings only write default values to configuration ini files

FInstancedStructs, or its TInstancedStruct sibling, can be included in a class that inherits from UDeveloperSettings. UDeveloperSettings will persist data in a configuration file. In the case of FI ...

Fade local light shadow with r.Shadow.DoesFadeUseResolutionScale doesn't work with VSM

When VSM is enabled, local light shadows don't fade even if r.Shadow.DoesFadeUseResolutionScale is true. Local shadows do fade based on resolution when using regular shadow maps (CSM). ...

Blueprint compiler doesn't always initialize struct consts correctly

Blueprints currently don't support unsigned 64 bit ints, but they do support signed 64 bits. If a Blueprint uses a native struct variable that contains a uint64 property, it incorrectly assigns that ...

Horde Artifact Browser can produce download URLs greater than 8KB

Using the Horde Artifact browser browse to a folder with a lot of files in a subfolder (for example temporary artifacts that contains Engine/Binaries/Win64, see attached) and use the "Download" butt ...

Niagara color picker user parameter preview no longer updates until confirmation

Starting with UE 5.4, the Color Picker Tool no longer updates preview values in real time for certain editor windows like Niagara when working with User Parameters. This behavior is a regression fr ...

WindDirectionalSourceComponent.h has a meta edit condition that, by referencing an undefined property (bSimulatePhysics), throws an error

WindDirectionalSourceComponent.h has a meta edit condition that, by referencing an undefined class property (bSimulatePhysics), throws an error in the logs: LogEditCondition: Error: EditCondition pa ...

Investigate PythonScriptPlugin module load order for preload module