This is a small Python script that can convert PAYDAY 2 normal maps to regular normal maps and vice versa.

Usage
Simply drag an image file onto one of the bat files, depending on which direction you want to convert.
You can also directly call the python script from the command line like this:
If you want to convert from PAYDAY 2 normal to regular, use "from", use "to" for the opposite direction.

Additional notes

• The conversion from Payday normal to regular normal only works if the Payday normal is grayscale. Some normals are red and I don't really know what's up with those so I didn't handle them differently. But you most likely want to use this to convert in the other direction anyways.
  
• You might need to install the Pillow library for Python if it's not included in your Python installation, you can do so with:
  pip install Pillow

• 1.1 - Added more userfriendly scripts