DOF - TAA pass ghosting when using r.DOF.TAA.CoCBilateralFilterStrength

UE - Graphics Features - Aug 7, 2025

In Unreal 5.6, there's a new CVar: r.DOF.TAA.CoCBilateralFilterStrength, which should help with ghosting artifacts introduced by TAA in DOF passes. However, it doesn't work as expected since many gh ...

Blurry RVTs after camera jump

UE - Graphics Features - Aug 7, 2025

When using Runtime Virtual Textures (RVT) on landscape in UE 5.5+, nearby tiles may remain blurry (low-resolution mips) after launching PIE or making large camera jumps (e.g. via bookmarks or viewpo ...

[AI] Changing NavMesh Resolution in config file does not update the quantFactor of existing navmesh

UE - AI - Navigation - Aug 6, 2025

When we changed the resolution in the config, if you open a map and then look at the navmesh, the resolution it shows is the updated one from the config (assuming you haven't overridden anything) ...

GPU Crash from out of memory read/writes in Lumen when using non-power-of-2 TracingOctahedronResolution

UE - Graphics Features - Lumen - Aug 6, 2025

When the r.Lumen.ScreenProbeGather.TracingOctahedronResolution is not a power of 2 or LumenFinalGatherQuality in a Post Processing Volume is set to a value such that the TracingOctahedronResolution ...

FObjectReferenceCache's ResolveObjectReferenceHandleInternal can return pointers to garbage objects

UE - Networking - Aug 6, 2025

A FindObjectFast call may return a pointer to an object marked as garbage. The use of that function in FObjectReferenceCache::ResolveObjectReferenceHandleInternal as well as FNetGUIDCache::GetObject ...

Interaction between sublevels and LevelSequences can break actors attachments hierarchy of the sublevel.

Having a LevelSequence opened and unhiding a sublevel can break the attachment hierarchy of the actors that are inside the sublevel. This also affects to the sublevel asset itself. ...

DataLayer: Duplication a GroupActor is broken

UE - World Creation - Worldbuilding Tools - Data Layers - Aug 5, 2025

The result of the duplication operation is that the Actors in the new group are part of the DataLayer but the new GroupActor is not.  ...

NavMesh generation should not care for Actors that are hidden in the Editor.

UE - AI - Navigation - Aug 5, 2025

The problem is that the Cube is still loaded but "HiddenEd". It's AActor::bHiddenEdLayer property is set to true by the WorldPartition System. The Actor is dirty which makes the WP system pin it (wo ...

Iris - RPCs split into partial blobs aren't received on non-replicated components

UE - Networking - Iris - Aug 5, 2025

This issue does not occur if the RPC is not split into partial blobs. The RPC is received on the non-replicated component if Iris is disabled. ...

FInstancedStruct does not serialise to JSON when used in a DataTable

UE - Editor - Workflow Systems - Aug 4, 2025

The JSON export functionality for DataTable relies on a FieldIterator to gather properties. This iterator is unable to gather the properties from the InstancedStruct. CSV export functionality works ...