Unreal Engine Issues
Unreal Engine Issues
The process of performing SetTextureParameterValue on a decal component during BeginPlay, the result will not be the same every time when streaming a level.
UE - Graphics Features - Jul 26, 2022If executing CreateDynamicMaterialInstance and SetTextureParameterValue on BeginPlay for the decal component, the decal will be different the first and second time level streaming. ...
Iris - removal of fast array item not performed on client when server array contains a non-replicated item
UE - Networking - Iris - Sep 8, 2025It is possible to add items to a replicated fast array that are not intended to be replicated to the clients. For example, FGameplayAbilitySpecContainer has a custom ShouldWriteFastArrayItem impleme ...
When launching from Mac to iOS, the process does not end normally, so the second and subsequent application launches from the iOS device are not performed properly
UE - Platform - Mobile - Apr 16, 2019If you deploy the app to the iOS device using the Mac editor's Launch button or Project Launcher, the second and subsequent launches will fail. The following message is output when startup fails. T ...
Performing seamless server travel while a Legacy Camera Shake with an Anim Sequence set is ongoing will cause a crash
zComponent - Archive - Mar 14, 2024When we server travel with seamless travel enabled, and a legacy camera shake with an anim sequence set is currently ongoing, we will get a crash due to the UMovieSceneEntitySystemLinker failing a c ...
Editor Performance issue : Loading/unloading multiple Levels / Level Instances triggers each time a call to FActorFolders::RebuildFolderListForWorld
UE - World Creation - Worldbuilding Tools - Level Instances - Nov 25, 2024Revisit how FActorFolders are updated when loading/unloading Levels (level instances). The code should maintain the folder list instead of rebuilding everything. ...
If a component is added to a subclass after a Blueprint has already been created using that subclass, and a hot reload is performed, the new component is not editable in the Blueprint.
Tools - Jan 29, 2015Adding a component to a subclass after the component was declared in the parent class results in the component not being editable if a Blueprint had already been created using the subclass. This onl ...
Editor crashes when the "Find in Blueprints" dialog runs its indexing task after any SlowTask was canceled by the user
UE - Framework - Blueprint - Sep 17, 2024If 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 ...
Editor stalls on Mac after key up, mouse up
UE - Platform - Apple - Dec 19, 2019UDN user reported a performance hit on Mac with the latest Hotfix release when the user is interacting with the editor either through keyboard or mouse input. This performance hit is noticeable whe ...
Can't Play in Editor After selecting a color for a border widget via the eye dropper
Tools - Jul 28, 2016Can't Play in Editor After selecting a color for a border widget via the eye dropper. If the user selects a color with the eye dropper tool and this color is outside of the color picker window, they ...
Increase in Engine Stats for large amounts of Hierarchical Instanced Static Mesh Components
UE - Graphics Features - Apr 18, 2017Increase in Engine Stats for large amounts of Hierarchical Instanced Static Mesh Components User Description: We are having performance drops of almost 5ms in 4.15 when using "Hierarchical Instanc ...