Unreal Engine Issues
Unreal Engine Issues
Global SkyAtmosphere and Clouds Issues (Ambient Light)
UE - Graphics Features - Dec 3, 2024Ambient Light on Volumetric Clouds from Sky Atmosphere always is calculated as if the clouds are at the north pole of the planet. Using a sphere-shaped Sky Atmosphere and Volumetric Clouds causes t ...
Light Leak Issue in Modular Buildings (Lumen HZBTraversal)
UE - Graphics Features - Lumen - Oct 14, 2025Starting in Unreal Engine 5.6, disabling "r.Lumen.ScreenProbeGather.ScreenTraces.HZBTraversal" can lead to light leaking between adjacent or overlapping meshes. Also tested on Release-5.6, CL: 4523 ...
Multi Sphere Trace is not returning the correct Impact Location
UE - Simulation - Physics - Jan 19, 2015Multi Sphere Trace is not returning the correct Impact Location. Other AnswerHub Report:https://answers.unrealengine.com/questions/30952/multisphere-trace-fhitresult-location-same-as-impa.html ...
Integrity of AnimSyncMarkers compromised while playing AnimMontage with root motion in server side
UE - Anim - Gameplay - Jan 11, 2023Reference UDN as it explains well the cause of the issue. ...
CableComponent particles spawn at origin when gameplay starts depending on component registration order
UE - Framework - Components - Jan 9, 2025A workaround was provided for the user, to use 'Set Attach End to Component' nodes during BeginPlay. While this fixes the issue in gameplay, the editor preview no longer syncs with gameplay. ...
Crash can occur in the Ansel plugin when setting Use Client Side Camera Updates to false in Player Camera Manager
UE - Graphics Features - Apr 18, 2017Setting the `bUseClientSideCameraUpdates` property in a `PlayerCameraManager` class to false can result in a crash in the Ansel plugin because `GEngine->GameViewport` may be NULL. Another user has ...
Creating a new Physics Asset will override the behavior of the previous Physics Asset inside the Phat Editor
UE - Gameplay - Aug 11, 2016Creating a new Physics Asset will override the behavior of the previous Physics Asset inside the Phat Editor. This seems to be linked to which physics asset is currently assigned to the skeletal me ...
Translucent User Interface materials do not have a thumbnail preview
Tools - Feb 15, 2018Translucent User Interface materials do not have a thumbnail preview. I do not see this issue with Translucent Surface materials. REGRESSION: No, this issue also occurs as far back as 4.17.2 ...
Inclusive Nativized Blueprints slower than Non Nativized Blueprints in packaged project
UE - Gameplay - Jul 1, 2019When nativizing blueprints the packaged build of the project runs slower than a non-nativized version of the packaged project. Found in 4.22 CL#7053642 Reproduced in 4.21 CL#4753647, 4.24Main CL#7 ...
Distant mesh / vista have visible Lumen bounces
UE - Rendering Architecture - Jun 15, 2024Objects far outside of the Lumen Scene don't temporally accumulate screen traces, leading to heavy flickering. It appears that the temporal reprojection is failing when comparing the depth in "Scree ...