Alright, I'm gonna make a quick rundown. Follow the steps and you should be fine.
1. set your preset (tan lines, pubic, color etc.)
2. [in photoshop] save as
3. [in photoshop] file name - copy the file name from the texture that you are using and delete EVERYTHING that's after
0001
ex.: pdw_00_nude_0001 dk => pdw_00_nude_0001
4. [in photoshop] (still in the save as window) select format -
D3D/DDS
5. [in photoshop] select where to save, preferably desktop, and save the file
you should now see the nVidia menu/tool
6. in the drop down menu select
DXT5 ARGB 8 bpp | interpolated alpha and click save
this will take a minute or two, depending on your computer
6. navigate to your files to patch folder for MetaInjector, should be
Program Files (x86)\Black Desert Online\Paz\files_to_patch
7. copy the created
.dds file from desktop into the files to patch folder
8. shut the game down
9. run MetaInjector, if in doubt how to do this refer to the
forum page
10. run the game and you should be good to go
EDIT: added this to the first post