Hi. I'm a bit new to using programs like gimp, and I need a bit of help. I was making a simple map as my first project, and I wanted to create a volcano-like area, and I was looking for inspiration and I came across this map: http://eragon2589.deviantart.com/art/Oreen-498739608

You can probably see, that his desert has a sand texture, his grass has a nice texture, and his volcano island has a rocky texture. Also, you can see most of his labels for areas are curved, how do I do that? Also, my land masses look nothing like his, I used the solid noise method, how did he do that? Also, I'm using gimp. Any reply is appreciated, thanks.