ARK .pnt files need to go into the “MyPaintings” directory:
C:\Program Files (x86)\Steam\SteamApps\common\ARK\ShooterGame\Saved\MyPaintings\
If you are using additional space to store your ARK Game files, look here:
Note: If the ‘MyPaintings’ folder can’t be found, you can manually create one yourself.
The “MyPaintings” folder itself only exists if you create it manually, or have saved a .pnt file in ARK previously.