Just to take away any myths about hidden programming of nangin within ts1.
All the maps of ts1 (AGE and ts1jp) are placed inside the C:\TwelveSky\G03_GDATA\D07_GWORLD folder, maps are not located anywhere else inside the client. So I just tested every single one of them. The number range from Z001 to Z0142. However the vast majority of numbers just contain minimaps, that are faction specific for other maps.
I checked all maps of ts1 using AGE's ts2 server, simply by replacing ts2 files with old ts1 files.
Example: Gocheon (guan 2nd map) loaded into Kailan city in ts2
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Doing this for all maps, I found no maps indicating presence of any "hidden" maps, except 1. Z140-Z142 all contain the same map, which i dont know, unless I have a bad memory. It looks like this:
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For a complete overview of all maps and corresponding files:
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There is a total of 59maps present in the client, no more.
btw, the same goes for gear, there is no gear set and character animations present for a 4th faction.
A few special pieces are there, like the nangin hat, but thats just a gm thing, and got little to nothing to do with nangin itself.