Unreal Engine Issues
Unreal Engine Issues
Unable to Create New Niagara User Parameter After Deletion without Niagara Editor Window Restart
UE - Niagara - Scripting - Apr 22, 2024When a user deletes a Niagara User Parameter within the Niagara System editor window, attempting to create a new parameter with the same name immediately after deletion results in an error. Despite ...
Custom Enums break blueprints on hot reload
UE - Gameplay - Blueprint - Aug 3, 2015If a custom code based enum is used inside a blueprint, doing a hot reload will break the nodes by assuming they are of a type other than enum. ...
Event Dispatchers do not update references when renamed
UE - Gameplay - Blueprint - Feb 23, 2016Event Dispatchers do not update event references when renamed if the green "+" is used to add the event in the Details Pane of an actor component. Note: Event Dispatchers appear to rename normally ...
Calling a Multicast RPC from a Player Controller creates a new Player Controller on the Client
UE - Networking - Jun 3, 2015Calling a Multicast RPC from a Player Controller creates a new Player Controller on the Client. In 4.7.6, this results in a repeating log warning: "LogPlayerController:Warning: Calling IsLocalContro ...
Child character's Variable changes to the default value in a packaged project
UE - Gameplay - Blueprint - Jun 22, 2015Child character's Variable changes to the default value in a packaged project. User Description: Name of player character resets (to default value specified in parent class) after packaging. 3. P ...
Compiler error on indirect blueprint component references when change is made to actorcomponent
UE - Gameplay - Components - Jul 10, 2015When blueprints associated with the actorcomponent are open and changes are made to the actorcomponent, once it's compiled there are compiler errors on the indirect blueprints. ...
Data loss caused by C++ Child Actor Component when compiling Child BP
UE - Gameplay - Blueprint - Dec 22, 2016Having Child Actor Components that are set in code can cause data loss upon compiling the blueprint. In this particular scenario, there are two custom Actor classes involved, MainActor and SubActo ...
Regression: "Play particle effect" anim notifies are not seen in the editor playing level sequence/matinee when Attached is set to false
UE - Graphics Features - Dec 21, 2017Not Attached particle system is not seen in the viewport of the editor. This particle will be seen normally when PIE. Regression? Yes. This issue is not reproduced in 4.17 version. You can simply ...
Gameplay Ability Component Montage Replication incorrectly handles cyclic animation sections
UE - Gameplay - Gameplay Ability System - Dec 4, 2023In AbilitySystemComponent_Abilities.cpp, the check for the client being on a different section on line 3059 checks that the RepNextSectionID is not the current section. One would assume this is beca ...
Null Material Layers in Material Instances cause Opacity Mask and WPO to break on Nanite Meshes
UE - Rendering Architecture - Materials - Oct 31, 2024When a Material Instance is loaded that has a nullptr layer in StaticParametrs.Materiallayers. The Material Instance will create it's own CachedExpressionData but the ConnectedParameterMask will be ...