The Terrain Brushes: Ruins pack's 75 brushes allows you to more quickly create terrain details such as ruins, trenches, berms, earthen walls, foundations or any other use you can think of for these brushes! They are designed to allow for the brushes to be "fit" together to make more complex scenes, and include brushes geared towards the making of rivers and mountains as well. Installation is as simple as extracting the pack, restarting, and using the brushes in your project.