First of all, let me know if it's "illegal" (moderator please)
Its not perfect.. I wonder why noone tired to do something like this before.
A bit buggy.. I don't have time to test everything.. but the only problem I found is Sunken Temple first floor doesn't work, but the second is way more than Blizzard gave us (Global map of Azeroth)
Character display works, so this "mod" is better than AtlasMap (blee) (need to test in party and raid, cuz I don't have friends lol)
How to install.. Simply put it to your 'Data' folder. Delete 'Cache', wait a decade for WoW to unpack cache from local and server database, and play.
If you already have a file named 'patch-w.mpq', just change the letter 'w' to anything, 'patch-a.mpq' for example.
PS: If you discover ANYTHING that fckd up, please let me know. Its just a scratch with like 3 hrs of actual researching, trying, and many more hours of timewasting with GM commands and teleport. :'DD for fun I guess. BTW I don't have any programming knowage (maybe a little), but I'm patient.
I tried, but it's not possible.. even 8.0.1 only have 1 floor index, and map file for Sunken Temple, so it's not exist in retail wow files even now. (according to wow.tools dbc database).. no DBC or map texture entries for floor 0, or 2.
Gnomeregan Map EntryID is 90, with 4 floors in independent rows with coordinates and map files.
109 is Sunken, with only 1 floor index row in 8.0.1
as you can see, Blizzard just forgot to add the first floor to the database