Merge JT Formats via C#

//Multiple source files that need to be merged
string[] files = {"template.jt", "template2.jt" };

//Process file merge to generate usdz file
Scene scene = new Scene();
int i = 0;
foreach (var file in files)
{
    using var fs = new FileStream(file, FileMode.Open, FileAccess.Read);
    FileFormat fmt = FileFormat.Detect(fs, files[i]);
    var subNode = scene.RootNode.CreateChildNode(files[i]);
    i++;
    try
    {
        Scene subScene = new Scene();
        var opt = fmt.CreateLoadOptions();
        subScene.Open(fs, opt);
        subNode.Entity = PolygonModifier.MergeMesh(subScene);
        MoveTo(subScene.RootNode, subNode);
    }
        catch (Exception)
        {
        }
}
var reviewFile = "result.usdz";
var usdz = new UsdSaveOptions(FileFormat.USDZ)
{
    PrimitiveToMesh = false,
    ExportMetaData = true
};
scene.Save(reviewFile, usdz);

//Process usdz files and save them in the format you want
var scene2 = new Scene();
var physicalFile = reviewFile;
using var fs2 = new FileStream(physicalFile, FileMode.Open, FileAccess.Read);
var fmt2 = FileFormat.Detect(fs2, "result");
var subScene2 = new Scene();
var opt2 = fmt2.CreateLoadOptions();
subScene2.Open(fs2, opt2);
var newNode = scene2.RootNode.CreateChildNode("");
double[] value = { 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 };
newNode.Transform.TransformMatrix = new Matrix4(value);
MoveTo(subScene2.RootNode, newNode);
var output = "merger.fbx";
scene2.Save(output, FileFormat.FBX7400ASCII); 

//MoveTo class for call processing
public static void MoveTo(Node subScene, Node parent)
{
    while (subScene.ChildNodes.Count > 0)
    {
        var node = subScene.ChildNodes[0];
        subScene.ChildNodes.RemoveAt(0);
        parent.AddChildNode(node);
    }
}