I do have ZT2 but I haven’t found the time, nor the markers, to properly experiment. I haven’t heard of anyone using it with Genesis just yet, it may be useful to contact the creator(s) of ZT2. For V4 and M4 you need to edit the registry, if you are on Windows, adding the keys contained in this thread: http://forumarchive.daz3d.com/viewtopic.php?t=100874
There was another thread: http://forumarchive.daz3d.com/viewtopic.php?t=190306 . Thinking back on that thread comments, green markers would be the best, I think, as shown in one of the ZT2 youtube videos. I believe the program reads luminance from the video stream, so a saturated green would jump out and make detection easier.
I really have no idea where to get good markers, though.