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

[ChenYiZh_0210 (ChenYiZh)]

@luke_micro_01

This method of trying to create a UStaticMesh at runtime turned out to be a dead-end for me. I would recommend checking out RuntimeMesh on github. They have a marketplace plugin, but support for >UE 4.25 is limited to installation from github.

If that sounds intimidating… I would still give it a shot their directions are easy to follow.

This is the correct answer, but GetSectionInfoMap() is only work on editor.
So i set section’s materialIndex directly

FStaticMeshLODResourcesArray& LODResources = StaticMesh->GetRenderData()->LODResources;
if (LODResources.Num() > 0)
{
	FStaticMeshSectionArray& Sections = LODResources[0].Sections;
	if (Sections.Num() > 0)
	{
		Sections[0].MaterialIndex = 0;
	}
}