Um.... I seemed to fix it, I was using GImp as my image editing software because I know how to use it, though it was a .bmp but it didn't work, so I put it into Photoshop then exported it as a .png and imported that and then it worked, so it either doesn't like Gimp or it doesn't like my .bmp's for some reason.
Hello,
I am quite new to Modding, but for some reason terrain builder changed colors of my sat map and mask image and I don't know why?
In the link it shows what I made and what appears
https://imgur.com/a/fNqVhLu