Unreal Engine Issues
Unreal Engine Issues
Collision Drawing in Cooked Builds (Development) doesn't Show Geometry for Nanite Meshes
UE - Rendering - Features - Jun 2, 2025Context The showFlag.CollisionVisibility 1 cvar is a viewport visualization mode that highlights which Actors will block visibility. The showFlag.CollisionPawn 1 cvar is a Player Collision viewmode ...
In AnimNode_RigidBody.cpp, PhysicsSimulation->CreateActor() is being passed World Space transforms, when it should be getting Local Simulation space transforms
UE - Runtime - Simulation - Jun 24, 2025In AnimNode_RigidBody.cpp, PhysicsSimulation->CreateActor() is being passed World Space transforms, when it should be getting Local Simulation space transforms. The licensee has reported that FAnimN ...
Chaos sometimes can not generate contact points while two dynamic convex hulls actually collide. It results in instability in the contact behavior - such as jittering, inconsistent contact forces, or unexpected collision responses.
UE - Runtime - Simulation - Dec 2, 2025Context: Chaos Physics is able to use convex hulls to represent object collision geometry for queries and simulation. Problem: Chaos sometimes can not generate contact points while two dynamic conv ...
Camera behavior during "Orbit Pan Mode" (Alt+MMB+Drag) is wrong while piloting an actor
UE - Editor - Developer Usability - Nov 18, 2025In the Level Editor, dragging the mouse while the "Alt" key is pressed performs one of the "Orbit" movements: OrbitRotation, OrbitPan, OrbitZoom. The same can be done while Piloting an actor. Howev ...
GameplayTags meta "Categories" return warning when all categories are not present inside the FGameplayTagContainer
UE - Gameplay - Gameplay Tags - Jan 12, 2026Categories are not processed correctly for gameplay tags when meta "Categories" is used. Categories filter which categories appear for the mentioned gameplay tag variable and with recent changes, it ...
GameplayTagQuery AutoDescription not refreshed after GameplayTag redirect on load
UE - Gameplay - Gameplay Tags - Jan 21, 2026FGameplayTagQuery does not refresh its cached AutoDescription after GameplayTag redirects are applied during asset load. As a result, after renaming a GameplayTag and restarting the editor, the Game ...
StateTree: While editing State Parameters or exposed properties of a Condition/Task, an ensure() fires when editing inputs of a Property Function bound to an array element
UE - AI - StateTree - Mar 5, 2026Consider an array property that can be edited in the StateTree editor. This can be a State Parameter or an exposed property of a Condition or Task, for example. Each element of the array can be boun ...
Grabbing a Destructible Mesh Child blueprint with a Phsyics Handle crashes the editor
UE - Simulation - Physics - Jun 20, 2016Grabbing a Destructible Mesh Child blueprint with a Phsyics Handle crashes the editor during PIE. NOTE: This issue occurs whether or not simulate physics is active on the destructible mesh compone ...
Full Scene Importer Blueprint will only set as Movable Components
UE - Editor - Content Pipeline - Import and Export - Jun 22, 2016When importing a full scene using the Full Scene Importer and having it create a Blueprint actor that will set it's default mobility to static. Even unchecking the Import as Dynamic option will not ...
UE 4.6.1 Memory Game Causes Mac OSX to Crash
Tools - Jan 19, 2015On a Mac running OSX 10.10.1, the launcher crashes when the user selects the "Memory Game" located in the "Learn" section under "Example Game Projects." ...