Unreal Engine Issues
Unreal Engine Issues
Lumen ignores Landscape Holes (Landscape Visibility) when Hardware Ray Tracing is enabled and Ray Lighting Mode is set to Surface Cache
UE - Graphics Features - Ray Tracing - Jan 31, 2025Context Lumen is the default global illumination and reflections system. Lumen renders diffuse interreflection with infinite bounces and indirect specular reflections in large, detailed environments ...
TRASH_Comp in Octree that missing unregister
UE - AI - Navigation - Feb 25, 2025the reproduce video and project are in the slack links: Slack Link: [Link Removed] ...
Values for InitialOnly replicated arrays can fail to be captured in replay when removed and re-added between checkpoints
UE - Networking - Oct 2, 2025When the first checkpoint is recorded, the correct array properties will be captured in the LifetimeChangelist. When these array items are later removed and another property on the actor is changed, ...
Landscape Grass Type will not build with static lighting leaving 'Lighting needs to be rebuilt warning.'
UE - World Creation - Worldbuilding Tools - Foliage - Sep 3, 2015When using the Landscape Grass Type and using a Static or Stationary light will throw the 'Lighting needs to be rebuilt' warning. ...
Cannot compile project with dedicated server in 4.8
UE - Networking - Jun 23, 2015If a project has built a dedicated server executable then it will fail when trying to convert the project from 4.7.6 to 4.8. EDIT: Following the steps on the wiki page for Dedicated Servers () in 4 ...
A function in a Blueprint Function Library that references another function in that library cannot be saved after closing and reopening the project
UE - Gameplay - Blueprint - Mar 1, 2015A function in a Blueprint Function Library that references another function in that library cannot be saved after closing and reopening the project. The library will save without error until the pro ...
Clear Timer node does not stop a looping timer
UE - Gameplay - Feb 16, 2015Setting a Clear Timer node does not stop the named function from firing. ...
Split Struct Pin on a Function output will return a compiler error
UE - Gameplay - Blueprint - Jan 13, 2015Split Struct Pin on a Function output will return a compiler error: Error Pin New Param 1 X named NewParam1_X doesn't match any parameters of function NewFunction_0 Error Pin New Param 1 Z name ...
Lightmaps on Mobile Devices Appear Dirtied and Pixelated
UE - Platform - Mobile - Jun 19, 2015Baked lighting on mobile has dirtied or pixelated lightmaps. When testing this issue I attempted to change various settings within the 'Lightmass' section and the changes made did not have much effe ...
Mesh blueprint has incorrect Scaling in viewport when added as a child blueprint component
UE - Gameplay - Sep 9, 2015If the user converts two static meshes in the level to blueprints, makes them movable, and then adds one to the other as a child blueprint component then the child component will scale incorrectly i ...