Unreal Engine Issues

Lumen causing exposure issues when several viewports are opened

Calling functions that have an implicit WorldContextObject parameter in a Blueprint function library will give a compile error about a missing __WorldContext pin

Calling functions that have an implicit WorldContextObject parameter (line trace, execute console command, etc) in a Blueprint function library will give a compile error about a missing __WorldConte ...

Using a custom #define as the condition for a UFUNCTION's declaration will cause the function to not show in blueprints

Using a custom #define as the coniditon for an #if / #endif that encapsulates a UFUNCTION that is marked as BlueprintCallable will prevent it from being visible in blueprints despite the #if resolvi ...

With Pause Event on frame 0, sequence will never be able to resume playing

With Pause Event on frame 0, sequence will never be able to resume playing. It appears to trigger the event again. ...

Having two Play Persistent Audio modules in Niagara will only play the first sound

Only one Play Persistent Audio module will work at a time in a Niagara emitter. ...

Enhanced Input does not fire a "Cancelled" event for mappings that were in progress, but removed during a key-rebuild

If the return value of a trigger goes from ETriggerState::Ongoing to ETtriggerState::None, without returning a ETriggerState::Triggered, then there should be a "cancelled" event that is fired when E ...

Add Code to Project fails to add a class to the project

Add Code to Project fails to add a class to the project. The project can't be reopened until the classes are manually removed and the project is recompiled. The following errors occur when using Add ...

Collision Profile Name variable gets reset on multiple select

When adding a variable of collision profile name type to an actor(as editable), its value gets reset when the instance becomes a part of multiple selection. ...

SingleSampleShadowFromStationaryLights does not work in UE5 (when GPU-Scene is used)

The flag is not propagated in FPrimitiveSceneShaderData::FPrimitiveSceneShaderData and so is missing in GPU-Scene primitive data. Need to add: .UseSingleSampleShadowFromStationaryLights(Proxy->UseS ...

TakeRecorder does not add a track to a level sequence when niagara FX is spawned

In UTakeRecorderActorSource::EnsureObjectTemplateHasComponent() function, MakeUniqueObjectName() generates the same name of a component which CachedObjectTemplate for TakeRecorder has already had. T ...