Volumetric fog black and not updating with real-time capture skylight

UE - Rendering Architecture - Oct 20, 2023

It looks like the skylight is not updating the CPU side SH values when Real Time Capture is enabled, and thus old/empty values are sent to the fog. ...

Possessable bound to Spawnable in parent sequence will break if its the only binding in the subsequence/shot

UE - Anim - Sequencer - Oct 19, 2023

Possessables bound to spawnables in parent sequences can break after the parent it de-spawned.  ...

Volumetric Clouds High Quality Aerial Perspective Issue

UE - Rendering Architecture - Oct 19, 2023

There is a workaround to set r.VolumetricRenderTarget.Mode=1. The lines appear to be coming from the temporal component of the Volumetric Clouds. Each frame, the lines are merged in from the previou ...

PIE crash on infinite loop in a BP construction script

UE - Gameplay - Blueprint Runtime - Oct 19, 2023

From the [Link Removed]: We had an issue where PIE was being stopped due to an "infinite loop" being detected in one of the blueprints construction script. This was also crashing the editor as the ...

Renaming WP map does not remove original external actors

UE - World Creation - Worldbuilding Tools - OFPA - Oct 19, 2023

Renaming a WP map through the content browser does not delete the external actors associated with the originally named map. The rename duplicate builder seems to work correctly and can be used inste ...

In UInstancedStaticMeshComponent, when some instances have near-zero scale, removing instances crashes the engine

UE - Rendering Architecture - Oct 19, 2023

Class "UInstancedStaticMeshComponent" deliberately leaves null pointers in the "InstanceBodies" array of FBodyInstances. This can be seen in methods such as: [Engine\Source\Runtime\Engine\Private\I ...

Crash when copying PF_Stencil format from the GPU to the CPU

UE - Rendering Architecture - RHI - Oct 18, 2023

This is a crash related to copying depth-stencil render targets to the CPU. See linked UDN for more info. ...

Nanite landscape mesh has a significant difference with normal landscape when using large Z scale value

UE - LD & Modeling - Terrain - Landscape - Oct 17, 2023

Result : there are significant differences between the generated Nanite mesh and the original landscape mesh (see [Link Removed]) Note : the bug was originally reported on this UDN : [Link Remove ...

Unable to affect setting cubemap blend in skyLight and reflections on transluscent materials

UE - Rendering Architecture - Oct 17, 2023

Attempting to blend SkyLight Cubemaps via the SetCubemapBlend function to blend between different Cubemaps to make the changes seamless is not reflected. As a workaround, in LumenTracingCommon.ush, ...

Flushing Level Streaming Can Trigger Actor Initialization during World Teardown

UE - World Creation - Worldbuilding Tools - Oct 16, 2023

From licensee: We've recently encountered an issue where BeginPlay was called on an Actor while the World is being torn down. This seems to stem from flushing level streaming while it has levels th ...