Oh my, it's been so long since I've set up Python:
- First, install a Python runtime from
https://www.python.org.
- Download the uvtt2fgu.py script from the github page. I would suggest into wherever you've saved (or going to save) your .dd2vtt file
- Go into a command prompt (cmd.exe for Windows, Terminal for Mac OS)
- "pip install Pillow" this is needed to add the extra library used to generate the .jpg file
- cd into where you've saved your .dd2vtt file
- run the script "./uvtt2fgu.py filename.dd2vtt". (Of course, replace "filename.dd2vtt" with the name of your dd2vtt file)
- This should result in filename.png, filename.jpg, and filename.xml being created
- Copy the .xml file into your campaign's "images" folder
- Import the .jpg inside Fantasy Grounds
For Mac OS: If you have homebrew installed, you could also install python with "brew install python3".
For Windows: umm.. haven't tried it myself on Windows, but is probably close to what is above. Will be trying this shortly. I've been primarily developing on Linux.