Those commands are the same as I used for that first test with the black background but as he stated, some images just need a manual followup to be cleaned. The main goal would be to try minimize that work.
The description he gives to make new masks is sort of familiar to me. To make bridge models winter compatible I used Adobe Fireworks and a certain blend mode to lift snow from the winter textures in Df using the non-winter versions to delete parts of the image so I could overlay the snow part pn textures that had no snow variant to begin with.
That was a very crude approach that I did by hand because it was only about 10 textures. The result wasnt perfect either but good enough for my level of skill. I was glad when I was done with that though
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)
I will dabble a bit with the steps he mentions in that post and see how it turns out.
Another thing, it might be easier to discuss this directly on Discord to determine the best course of action as long as our timezones are close enough together.
-edit
The command you asked about is ready to be run in a folder, if you create a file that ends in .cmd or .bat , paste the code in there and execute that, it should do the job. There should be a folder named output in the folder you decide to run it in, thats where the processed files will be stored.
You will need to install ImageMagick, I went with version 7. Make sure to let it add itself to your system paths during the installation wizard and to install the legacy convert tool which is also a choice you are given during installation.
If you cant figure it out Ill give clearer instructions when Im on my pc again