Attribute Reader + Torus Shape Location module cause NaNs in CPU Niagara systems

UE - Niagara - Sep 5, 2023

It appears using the attribute reader with the shape location module set to torus will cause NaNs. The log mentions Sphere Radius among them, which should not be used with the torus mode. ...

Volumetric lightmap + stationary light has missing shadows

UE - Rendering Architecture - Sep 5, 2023

Primitives with the "Lightmap Type" set to "Force Volumetric" are not shadowed correctly. Issue dates back to at least 4.27.2. As a workaround, making FLightCacheInterface::GetStaticInteraction al ...

Editor/Details Panel allows duplicate keys in TMap/TSet UPROPERTY()

UE - Editor - Workflow Systems - Sep 5, 2023

When edited through the Details Panel in the Editor, TMap and TSet properties should not allow duplicate keys. When those keys are USTRUCTs with the “WithIdenticalViaEquality” trait, this should be ...

[MetaSounds] - Trigger inputs called by Execute Trigger Parameter refire on MetaSounds that become active after virtualization

UE - Audio - MetaSounds - Aug 31, 2023

If trigger execute is called in Blueprint, it will fire every time the sound recovers from being virtual, even if it has not been called again. See video example: [Link Removed] Also occurs in Re ...

Scene View Extension - Subscribing to Tonemap's afterpass renders black screen

UE - Rendering Architecture - Aug 31, 2023

Callbacks for the Tonemap's afterpass that return identity return black screen unless there is a post-process material. ...

Static Mesh Scene Actor Flipped Normals

UE - Rendering Architecture - Aug 31, 2023

Static meshes can have normals flipped when the actor they are attached to has one component of its scale inverted. ...

Crash when adding foliage instances to unloaded IFA

UE - World Creation - Worldbuilding Tools - Foliage - Aug 31, 2023

Ran into a crash when trying to programmatically add foliage to a large WP level with some unloaded IFAs.  ...

Inconsistent behavior with Register State Branches

UE - Editor - Workflow Systems - Aug 31, 2023

ISourceControlProvider::RegisterStateBranches(...) doesn't reliably warn on conflicts ISourceControlProvider::RegisterStateBranches(...), specifically FPerforceSourceControlProvider, is supposed to ...

WorldPartitionHLODsBuilder keeps generated HLOD meshes and causes run out of memory

UE - World Creation - Worldbuilding Tools - HLOD - Aug 30, 2023