Unreal Engine Issues
Unreal Engine Issues
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 ...
User Play Space Rot does not change anything in Client Play Camera Shake
UE - Gameplay - Jun 11, 2015User does not change anything in Client Play Camera Shake. Reproduced in 4.8 and Main (//depot/UE4/Promotable-CL-2581498). This is a Regression: it works as expected in 4.7.6 ...
Destructible attached with a Physics Constraint have inconsistent physics
UE - Simulation - Physics - Destruction - Jul 26, 2016Destructible attached with a Physics Constraint have inconsistent physics compared to a standard Static Mesh. This is also sometimes prevalent with Destructibles that aren't attached with a Physics ...
Crash, Couldn t find Shader FHitProxyVS for Material Resource M_Glass
UE - Graphics Features - Aug 18, 2014Changing the properties of M_Glass and M_Metal_Copper to two sided via the property matrix crashes the editor to desktop. (Note: M_Glass with ANY of the M_Metal Materials except M_Metal_Chrome will ...
Physics enabled Child Actor components that spawn with with a delay, always spawns at world origin
UE - Gameplay - Jun 3, 2016Physics enabled Child Actor components that spawn with with a delay, always spawns at world origin **This is a regression. It was working in 4.11.2 Could also be related to: [Link Removed] User D ...
Crash when using StaticDuplicateObject with mismathced Source and Destination class types
UE - Foundation - Jun 19, 2025Starting in Unreal Engine 5.4, StaticDuplicateObject internally switched to using Unversioned Property Serialization (UPS) for performance reasons. However, UPS assumes the source and destination ob ...
Editor crash when adding mesh renderer elements in Niagara
UE - Niagara - Jul 8, 2025When adding multiple meshes to a Niagara Mesh Renderer Module, a check() will be triggered due to a mismatch in the number of Widgets and the number of Tooltip Widgets. ...
Add Submix Effect Blueprint Does Not Have Any Effect
UE - Audio - Dec 11, 2020Adding a second effect to the Submix Effect Chain on a Submix works as expected, but when trying to add a Submix Effect via Blueprint, there is no effect. This also applies to "Add Master Submix Ef ...
GAS: Removing an AttributeSet followed by removing an active GameplayEffect results in client crash
UE - Gameplay - Gameplay Ability System - Aug 23, 2023Gameplay Ability System Standalone: Removing an attribute set and then removing an active gameplay effect that has a modifier for an attribute from that set results in a crash. Currently, one must ...
An ensure is triggered when a StaticMesh is set inside a StaticMeshComponent on an actor, and another actor references the static mesh actor from two child actor components.
UE - Content - Engine - Feb 5, 2025There is an issue when setting a Static Mesh inside a blueprint that it is referenced by another blueprint with more than one child actor. An ensure is triggered inside the engine, and there is a ...