When a BPActor containing HISMs is multiplied with a scale, LOD display control doesn't work correctly

UE - Rendering Architecture - Nov 29, 2023

Workaround 1: 1. Change HierarchicalInstancedStaticMesh.cpp in either of the following ways:void{{ FHierarchicalStaticMeshSceneProxy::GetDynamicMeshElements(const TArray<const FSceneView*>& Views, c ...

Crash Duplicating an empty AtlasRow material node

UE - Rendering Architecture - Materials - Nov 29, 2023

This isn't a hard crash, but a "verify(...)" from MaterialExpressions.cpp, line 559. ...

Some post-processing passes sample outside of the viewport when using scene capture components

UE - Rendering Architecture - Nov 29, 2023

It looks like the SSAO shader does not clamp its sample space to the half view size for the two inputs "Ambient Occlusion" and "AmbientOcclusionSetup", leading to invalid data entering the edge of f ...

Volumetric fog flicker side screen

UE - Rendering Architecture - Nov 29, 2023

The flicker is visible in Epic scalability as well, it is just smaller on screen because the fog voxels are smaller (r.VolumetricFog.GridPixelSize). ...

Nanite shadow issue in commandline rendering

UE - Anim - Sequencer - MRQ - Nov 28, 2023

UMovieSceneDMXLibrarySection::GetFixturePatches returns invalid patches

UE - Virtual Production - IO - DMX - Nov 28, 2023

UMovieSceneDMXLibrarySection::GetFixturePatches() returns an invalid patch as follows. The if condition needs to be corrected.  TArray<UDMXEntityFixturePatch*> UMovieSceneDMXLibrarySection::GetFixt ...

Luminance coefficients used throughout the engine not matching sRGB standard

UE - Virtual Production - Rendering - Color - Nov 27, 2023

This is causing confusion when working with color in UE5, specifically when validating for HDR between different reference materials. It has also been noted that the color primaries in PAL and NTSC ...

Static Mesh Only enabled Foliage Actor causes serialization error in packaged game

UE - World Creation - Worldbuilding Tools - Nov 24, 2023

The crash can be worked around by modifying FFoliageISMActor::Serialize as following code : void FFoliageISMActor::Serialize(FArchive& Ar) { #if WITH_EDITORONLY_DATA     if (!Ar.IsCooking()) // ...