Code example to add blind watermark to 3D format
Input file
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Watermark Information
Watermark Password
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                                using Aspose.ThreeD;

var scene = Scene.FromFile("$inputFile");
var numMeshes = 0;
scene.RootNode.Accept((Node node) =>
   var mesh = node.GetEntity<Mesh>();
   if (mesh != null)
	 mesh = Watermark.EncodeWatermark(mesh, "HelloWorld", "1234");
	 if (mesh != null)
	   node.Entity = mesh;
   return true;
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