Unreal Engine Issues
Unreal Engine Issues
Editor crashes while switching to paint mode if material has a grass output and landscape visibility mask
UE - LD & Modeling - Terrain - Landscape - Aug 10, 2016Editor crashes while switching to paint mode if material has a grass output and landscape visibility mask. Frequency: 3/3 ...
Spawn Actor From Class Multiplying Transform Scale By Original Object Scale
UE - Gameplay - Jun 9, 2016When using the Spawn Actor from Class node, the Spawn Transform Scale is being multiplied by the actor's original scale, instead of just setting the scale to the Spawn Transform's value. In 4.11.2, ...
[AI] The ZoneGraph show flag is in the ZoneGraphEditor module but used during runtime in ZoneGraph module
UE - Runtime - Character - Mar 18, 2025The show flag for ZoneGraph lives in the ZoneGraphEditor module, but it is used for debugging at runtime by the main ZoneGraph module. There are protections around the type of build and some for EDI ...
LIVE: Changing a Custom Event to Multicast in a parent blueprint causes crash
UE - Gameplay - Blueprint - Nov 13, 2014Changing a Custom Event to Multicast in a parent blueprint causes crash if the Custom Event is being used in the child blueprint. Callstack: MachineId:DE189244480D3CD0F8CA729A02DD38A6 UserName:tjb ...
Overridden Interface Functions in Child BPs lose array output pins after closing/reopening the project and become invalid
UE - Gameplay - Blueprint - Feb 7, 2015Overridden Interface Functions in Child BPs lose array output pins after closing/reopening the project and become invalid. Reproduced in Main //depot/UE4/Promotable-CL-2434822 ...
UMG Throbber is not showing in project when using 'Set Number of Pieces' node off of Event tick
UE - Editor - UI Systems - Apr 22, 2015If you add a throbber to a UMG Blueprint and use the Graph of the Blueprint to change the 'Set Number of Pieces' and use 'Event Tick' to tick the widget, the throbber widget will not appear on scree ...
Adding/Removing a Material Layer on a Parent Material doesn't propagate to Children correctly
UE - Rendering - Architecture - Materials - Jun 9, 2026When a Material Layer is added to or removed from a Parent Material the layer changes don’t automatically propagate to Child Materials correctly even if the Parent Material is saved. The Child mate ...
Lighting channels not working as expected when enabling Ray Tracing Shadow
UE - Graphics Features - Lumen - Oct 13, 2020Non-Ray Tracing Shadows are only cast from lights on meshes assigned to the same Lighting Channel. When enabling Ray Tracing Shadows this is not the case. Lights will still cast Ray Tracing Shadows ...
Empty Shot Track Breaks Camera Component tracks when using Camera Cut Track
UE - Anim - Sequencer - Aug 18, 2016Empty Shot Track Breaks Camera Component tracks when using Camera Cut Track ...
4.6 Delegate error in Blueprints
UE - Gameplay - Blueprint - Dec 12, 2014When looking into the bd_hud_scoring and bd_rules_maze blueprints in the users project (Provided below), there are nodes that are throwing errors. If you press compile, the errors go away and the co ...