Setting the material of a UStaticMesh built from Mesh Descriptions at runtime

Development Programming & Scripting C++
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3

I have the same problem and I think it is about this code in \UE_5.1\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp\BuildFromMeshDescriptions (BuildFromStaticMeshDescriptions uses that function to operate)

#if WITH_EDITOR
	else
	{
		Build(true);
	}

	for (int32 LODIndex = 0; LODIndex < NewNumLODs; LODIndex++)
	{
		FStaticMeshLODResources& LODResources = GetRenderData()->LODResources[LODIndex];
		for (int32 SectionIndex = 0; SectionIndex < LODResources.Sections.Num(); SectionIndex++)
		{
			const FStaticMeshSection& StaticMeshSection = LODResources.Sections[SectionIndex];
			FMeshSectionInfo SectionInfo;
			SectionInfo.MaterialIndex = StaticMeshSection.MaterialIndex;
			SectionInfo.bEnableCollision = StaticMeshSection.bEnableCollision;
			SectionInfo.bCastShadow = StaticMeshSection.bCastShadow;
			GetSectionInfoMap().Set(LODIndex, SectionIndex, SectionInfo);
		}
	}
#endif