Again, not a modeler, but, if all the strands are created from the same number of vertices, could you duplicate the model and use a spread sheet to define the faces between the two to create strands? For example,on a model with 10,000 vertices, if each strand were defined by four vertices, with the first strand being composed of vertices # 1,2,3,4 and the second by 5,6,7,8, could you duplicate and slightly offset it, combine both into a single obj file, and define the faces of the three segments on the first two strands as: f 1 2 10002 10001 f 2 3 10003 10002 f 3 4 10004 10003 f 5 6 10006 10005 f 6 7 10007 10006 f 7 8 10008 10007 Appears tedious but would really only take a few seconds in a spreadsheet. (and you can cut and paste from Excel into an .obj file) This sounded simpler to explain before I started to type. :-0