Dark square appears in hair in direction of spotlight when shadows disabled

UE - Graphics Features - Sep 18, 2024

A dark square appears in the direction of a spotlight on hair when the spotlight has no shadow. [Image Removed] In UE 5.4 the dark square is visible when the spotlight has no shadow, and a light s ...

Iris - Fast Array ItemMap is empty in PostReplicatedAdd

UE - Networking - Iris - Sep 17, 2024

With Iris enabled, the ItemMap is populated correctly only on the next frame, but it is empty during the callback. This differs from the behavior of the current system, where the ItemMap is populat ...

Some Niagara FX does not show up in MovieSceneCapture when AgeUpdateMode is DesiredAgeNoSeek

UE - Niagara - Sep 17, 2024

CL23957356 changes how to calculate FrameOffset in FNiagaraSystemUpdateDesiredAgeExecutionToken::Execute(). After this change, DesiredAge + FrameOffset could be 0.0 for some a couple of initial fram ...

Modifying FSuggestProjectileVelocityParameters::ResponseParam.CollisionResponse modifies FCollisionResponseParams::DefaultResponseParam

UE - Gameplay - Sep 17, 2024

FSuggestProjectileVelocityParameters was introduced in 5.4 and has a FCollisionResponseParams member that's initialized as a mutable reference to FCollisionResponseParams::DefaultResponseParam. str ...

Preview Text display on Font Editor does not apply SubFontFamily setting

UE - Editor - UI Systems - Sep 17, 2024

The Preview text display in the Font Editor does not apply the Sub-Font family settings. Only the Default Font Family and Fallback Font Family can be applied to the display. ...

Cursor locks to ScrollBox in native fullscreen mode are locked in the wrong position

UE - Editor - UI Systems - UMG - Sep 17, 2024

When specifying a widget of a different size than the screen in FReply::LockMouseToWidget, the cursor is locked to a different position in native full screen mode. It appears that the window size n ...

Editor crashes when the "Find in Blueprints" dialog runs its indexing task after any SlowTask was canceled by the user

UE - Gameplay - Blueprint - Sep 17, 2024

If any SlowTask is canceled by the Editor's user, and later on the "Find in Blueprints" dialog is opened and needs to perform its async indexing task, the Editor crashes on thread FAsyncSearchIndexT ...

InverseExposureLerp should return 1.0 when EYE_ADAPTION_DISABLED is 1

UE - Graphics Features - Sep 16, 2024

Materials using EyeAdaptationInverse may render incorrectly when debug visualizations are active.   This issue can be resolved by modifying the EyeAdaptionInverse function in EyeAdaptionCommon.us ...

Force Feedback has incorrect duration on iOS devices

UE - Platform - Apple - Sep 16, 2024

The user also describes not being able to tell the difference between a force feedback value of 0.3 and 1,0 on iPhones Note: This is likely an issue somewhere in FIOSInputInterface::SetForceFeedb ...

Volumes with infinite or missing faces when importing .fbx file

UE - LD & Modeling - Modeling Tools - BSP - Sep 16, 2024

UDN Description: We are having issues with the "Create Blocking Volume" tool on StaticMeshActors. When we create a convex blocking volume (any convex, rough or heavy), we often have volumes that ha ...