Unreal Engine Issues

Lumen Leaking and Reflection Flickering

Mobile preview does not follow PIE seamless travel

FMaterialResource::IsTangentSpaceNormal default value behaves differently whether material uses material attributes

A UDN user has reported that a difference in appearance between two identical materials with the only difference that one uses material attributes. I have boiled down the issue to FMaterialResource ...

Cooked materials and material instances size have doubled when upgrading from 5.1.0 to 5.2.0

UDN: [Link Removed] A UDN customer has observed that their cooked materials have doubled in asset size going from 5.1 to 5.2. We need to investigate this is only a local issue on their side and no ...

Interchange tests framework need to support python pipeline

Post Process Materials After the Upsampler Have Incorrect ViewUniformBuffer Information

A proposed solution to this has been given by the licensee, please see the related UDN. ...

TraceDataFitering is not activated when LiveTrace is started from the Editor.

TraceDataFitering is not activated when LiveTrace is started. We can force it to be active by calling the following code.  IUnrealInsightsModule& UnrealInsightsModule = FModuleManager::LoadModuleCh ...

Navmesh does not update according to the volume, when an actor with a navigation volume tied to a parent is moved.

When a NavmeshBoundsVolume or NavModifierVolume is parented to another actor in the outliner, navmesh is not updated along the volume when the parent actor is moved. If the volume is deleted and the ...

Delay when entering text into EditableText using Microsoft IME after switching between half-width and full-width characters

When adding text after switching from half-width to full-width input using Microsoft IME, there may be a delay of about 3 seconds before the text can be entered correctly. This is supposed to occur ...

When breaking a level instance, foliage instances in the LevelInstance are placed in the wrong location

Following code works as a work around. The code updates placement information of instances. TMap<UFoliageType*, TArray<const FFoliageInstancePlacementInfo*>> AInstancedFoliageActor::GetInstancesF ...