static void AppendStaticMesh ( const [UStaticMesh](API\Runtime\Engine\Engine\UStaticMesh) * StaticMesh, const [UStaticMeshComponent](API\Runtime\Engine\Components\UStaticMeshComponent) * StaticMeshComponent, const FTransform & StaticMeshTransform, [UGeometryCollection](API\Runtime\GeometryCollectionEngine\GeometryCollection\UGeometryCollection) * GeometryCollection, bool ReindexMaterials )