The image below shows the result of making three TGA files named Mask3_0 to _2, and the map shows three colors, but it's still a mess.
- I don't know how and why naming them mask3_0 to _2 makes them show up during the first scenario of the campaign. I thought the first number told the game during which scenario should they show up?
- the color overlays are too thick, I can barely see the map below. Is there a way to make the overlays more transparent?
- How can I make the "sea overlay" disappear? I tried to create a completely black mask (mask3_2), thinking the game would leave the sea without an overlay, but it created a black one.

I attached the map and TGA files to the post.
EDIT: it seems I can't attach files, why?
EDIT2: made a dropbox for the TGA and map images -> https://www.dropbox.com/s/0ai4adoivyyst ... p.rar?dl=0

