Unreal Engine Issues
Unreal Engine Issues
Initializing and setting Physics Constrained in the Construction Script doesn't work in PIE
UE - Gameplay - Jan 25, 2016Initializing and setting Physics Constrained in the Construction Script doesn't work in PIE Could be related directly too: https://jira.ol.epicgames.net/browse/UE-7878 User description: However, ...
RootMotion Malfunctioning When Played in Lower Framerates
UE - Gameplay - Player Movement - May 2, 2016Root Motion Animations are not functioning correctly during lower frame rates. For example, a character moving forward 2 meters at regular frame rate will move 10 meters at a lower frame rate. Regr ...
Ambient Cubemap Assignment in Post Process Volume does not work with Forward Renderer
UE - Graphics Features - Nov 8, 2016The Ambient Cubemap assignment in a Post Process Volume doesn't work when using the Forward Renderer. I want to note that Cubemap assignment in the Skylight does work. I checked this just to make s ...
ToggleDebugCamera Console Command doesn't disable an enabled DebugCamera
UE - Gameplay - Aug 5, 2019The "DisableDebugCamera" node and the "ExecuteConsoleCommand" node with "ToggleDebugCamera" in the Command field do not disable an enabled Debug Camera. Found in 4.22.3 CL#7053642 Reproduced in 4.2 ...
Crash when using Landscape when building lighting with commandlet
UE - Graphics Features - Jun 6, 2016When using the new Rebuild Lighting commandlet will cause a crash with any level that builds when it has a landscape in the scene. https://github.com/EpicGames/UnrealEngine/commit/f89256dd0efb7d0b ...
Child Actor Component Not Destroyed When Parent BP Is Replaced in Scene
UE - Gameplay - Blueprint - Oct 16, 2015Having an actor in the level with a child actor component, replacing it with another copy of itself, and deleting the copy results in a Child Actor remaining in the world outliner, which cannot be d ...
Meta Quest - Visual Artifacting in right eye with Lumen enabled and effects quality set to High
TM - VR - May 9, 2025Reported in SF [Link Removed] On Meta Quest headsets, when Lumen is enabled for VR, setting the Effects Quality to High can cause visual artifacts to appear in reflections in the right eye of the h ...
Surface Profile Skin shading has some unexpected stripe rendering issues
UE - Graphics Features - Apr 3, 2018So it looks like the artifact is definitely related to whether sss checkboard is enabled, but I can't reproduce it if enabling checkboard right after open the map, I mean it has to be reproduced aft ...
Incorrect Lumen Scene direct lighting when objects behind masked landscape
UE - Rendering - Features - Lumen - Oct 5, 2025When objects are placed behind or beneath a masked landscape and r.Lumen.HardwareRayTracing.SurfaceCacheAlphaMasking is enabled, the direct light evaluation is incorrect. There are two workarounds, ...
Non-determinism in StaticMeshComponent::BodyInstance when cooking LevelInstances
UE - Runtime - Simulation - May 21, 2026A licensee reported that serialization of LevelSequence with StaticMeshActor with default collision for which mesh has NoCollision profile is not deterministic. The issue seems to be in the fact tha ...