Our styles are very similar, but I think you're much better at this than I am, heh. Something I do differently that I would recommend to people is that rather than using the clone tool to draw the things that you just load the entire texture picture into the map and then use a mask tool to select where it shows. You get the same effect, but it makes it a lot easier to edit, especially if you're dealing with multiple layers of things and you want to try out how they look. Hold on let me grab a screenshot of one of my maps;

Ok here we go: http://www.routinedelirium.com/forsaken/caveguts.jpg

Everything (except the furniture) is a solid layer. It's a much more forgiving way to make things.

Thanks for the tutorial, I'm definitly gonna use it when I get around to making some geographic maps