This is my base level campaign map, which is pretty crude (dark brown is mountainous, light brown hills, green forest, etc.). I would like to convert it into a satellite style map and I have been reading the various tutorials to learn how to do this. My first hurdle is that I am starting with a map that was not necessarily created with further development in mind. The good news is that it is a nice big map made in Gimp (something like 5500 x 3000). The bad news is that it is all one layer. I am wondering if it would be better just fill the whole continent to one color and then start over with features using another copy for reference, or if it is reasonable to work with what I have. Any suggestions?