Unreal Engine Issues
Unreal Engine Issues
Niagara mesh particles invalidate lighting when "Cast Shadow" is enabled with Hardware Ray Tracing enabled
UE - Graphics Features - Lumen - Jun 24, 2025Lumen HWRT, combined with Niagara Mesh Renderer, can cause the Lumen Scene to be reset, resulting in a sudden change to indirect lighting. ...
Inconsistent Details Panel Focus Behavior On Enter Pressed for Blueprint-Added Components
UE - Editor - Workflow Systems - Jul 2, 2025When editing a component property in the level viewport, if the component was added via the Blueprint Editor, pressing Enter after changing a value causes the details panel to lose focus. This inter ...
Start Up Movies Require Click when Finished to Open Level
Tools - Sep 11, 2015After a Start Up movie has completed playing, the initial default map will not load until the user clicks the mouse. The option to 'Wait for Movies to Complete' is checked which will force the user ...
Actors spawned at runtime and moving via SetActorLocation do not generate hit events with static objects
UE - Simulation - Physics - Feb 1, 2016When an actor that is spawned at runtime is moved via SetActorLocation and collides with a static object, no hit events will be fired. If the same static actor begins simulating physics, the dynamic ...
SceneCapture2D Actor using SceneDepth in R not Working as Expected
UE - Graphics Features - Oct 14, 2016The new SceneCapture2d feature 'SceneDepth in R' is not rendering the scenes depth in both Perspective and Orthographic projections as expected. The user originally mentioned he was using Orthograp ...
GPU Particle collision Ignores 2D Sprite Collision
UE - Graphics Features - Jan 19, 2016GPU Particle sprites will collide with a paper 2D assets texture but not the collision box. ...
Special modifier key inputs do not register in editor if the key press occurs instantly
Tools - Mar 1, 2016Special function key presses and hotkey shortcuts do not register in the editor if they fire key presses instantaneously (0ms). In particular, TypeMatrix keyboards reproduce this error using keyboar ...
Changing Time Dilation at runtime causes erratic physics with Vehicles
UE - Simulation - Physics - Oct 20, 2015When changing Time Dilation settings at runtime, it can cause vehicles to be thrown into the air and exhibit other odd physics behavior. This issue occurs when the Time Dilation is being set from sl ...
Using the Execute Console Command node to run demoplay causes the editor crash/freeze
UE - Networking - Nov 13, 2015This bug has different behavior throughout the 4 different versions listed. 4.8.3 - Gives an assert 4.9.2 & 4.10 - Gives a fatal error crash 4.11 (Main) - Freezes the editor without a crash report ...
Significant Frame Rate Drop When Multiple Persona Windows Docked in the Background
OLD - Anim - Dec 5, 2014Windows: Opening a persona window causes the editor to lose approximately 10fps per window (4 persona windows open = -40fps) Even when docked and running in the background. Mac: Opening a persona w ...