Separate translucency rendering and material BumpOffset UV issues

UE - Rendering Architecture - Oct 20, 2023

It appears as if the primary screenpercentage is being sent as the screen size to separate translucency materials, even though separate translucency has its own screenpercentage (r.SeparateTransluce ...

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.  ...

Deprecating a non-const blueprint interface function replaces the implementation of the event with an empty custom event

UE - Gameplay - Blueprint - Oct 19, 2023

This behaviour is only observed when implementing the function as a custom event from a blueprint interface. This behaviour is not observed in actors where the blueprint interface function is implem ...

Landscape layers ending with _0, _1, etc. don't work

UE - LD & Modeling - Terrain - Landscape - Oct 19, 2023

Result : only the layer not ending with _0 or _1 will actually render (i.e. Layer0 in the previous example) Expected result : all 3 layers can be painted, no matter their name ...

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 ...

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. ...

Unable to recapture the network channel data after stop the profile

UE - Foundation - Insights - Oct 18, 2023

It appears that networking insights data is not being gathered when a delay capture is started with the "trace.send" or "trace.start" command. If we were starting from the application startup time w ...

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 ...