Realism is a dialect that contains realistic terrain, although mistaken for satalite maps. Its not used yet, but it'll soon, only some professional mappers can do this, but it can take about a month or a year to do this other than the whole dialects in 1 day to 2 weeks of work.
How it works
First off, the map is actually satellite, it can be in Google Images or you can take a photo on the google maps. This is only recommended for Paint.NET or Photoshop because if you used Paint on realism, it doesn't look good. it was imagined that CGI is used for animations.
Who uses it