Unreal Engine Issues

WP: Using Make Writable when deleting actors from scene does not delete the actors

When working in a World Partition level using OFPA, trying to use the "Make writable" option instead of checking the asset out will result with the actor coming back to the map after restarting the ...

SplineMeshComponent resources leak

A race condition occurs in the InitSplineVertexFactory_Internal }}function call, which is distributed across multiple threads. This causes {{FSplineMeshVertexFactory to be instantiated multiple time ...

Color picker widget auto-closes unnecessarily

A licensee reports that the color picket widget in Unreal Editor closes whenever a blueprint actor (map placed instance of an actor blueprint) receives a property changed event, even if the change e ...

Null FPhysicsActorHandle dereference in FBodyInstance::InitDynamicProperties_AssumesLocked when CreateShapes_AssumesLocked fails during async body init

Summary When CreateShapes_AssumesLocked fails during async body creation, the failed FBodyInstance is left in Bodies[] with a released actor handle. InitDynamicProperties_AssumesLocked is then called ...

Values passed through VertexInterpolators are incorrect in the pixel shader on Niagara mesh particles when material uses SubUV animation

Passing through the vertex interpolator, the DebugFloat3Values output appears garbled, but if you remove the VertexInterpolator the particle’s position is accurately returned. This happens with Part ...

Sequencer binding resolve fails in packaged builds for actors in non spatially loaded Level Instances

Brick Pattern Artifact in Volumetric Clouds

A licensee has reported seeing a repeating brick-like pattern in volumetric clouds when they overlap with very distant geometry (or at the transition between nearby and distant geometry). The artifa ...

FMassMoveTargetFragment::CreateNewAction does not update PreviousAction, breaking the start-of-path avoidance fade and related behavior for MassEntity crowds

In MassEntity-based crowds, when an agent transitions from Stand to Move and begins walking, the Avoidance trait parameters StartOfPathDuration and StartOfPathAvoidanceScale, which are meant to temp ...

MATERIAL_SHADINGMODEL_TOON macro is not propagated to the substrate tool BSDF material on a DDC hit

On a DDC hit, the SubstrateMaterialBsdfFeatures variable restored into MaterialCompilationOutput is not copied into SubstrateTranslatorData.SubstrateMaterialBsdfFeatures, which is referenced by the ...

Water ripples stop occurring during long-distance movement in WaterBody with bEnableLocalOnlyTessellation enabled