Yes, i'm new on rAthena i mean in this community but i can guarantee you i can fix it.
Anyways, making using BrowEdit 586 or 620 as i said earlier, you can't fix it not totally fix some areas are fixes but everytime you walk in other tiles it will be blacken.
Trust me.
No Offense for this Brandon
For all players having issues with 'Blackening Textures In-game' just hit this and follow.
We will use the 'Hexing Method'
Open 'XVI32' or any Hexing Editors.
Find the .rsw,(File) open it up in a Hex Editor or XVI32, and look for "0201" on the first line and change it to "0109".
NOTE: if you Hex the .gat(File) it will give you like this "unrecognized version".
It should be worked, and i can guarantee it tested with Ivion 'Matrix Illion Map'
Please give me some feed back.
Regards,
Nemesis / War of Immortals