The Terrain Tools Sample Asset Pack contains a collection of Assets to jump-start development for users interested in utilizing Unity’s growing Terrain system. It includes 35 Terrain Brushes as well as many high quality Terrain features such as canyons, ridges, and mountains that are ideal for stamping. There are also 6 Terrain Layers with high quality PBR-ready Textures for painting dirt, moss, rock, sand, scree, and snow onto your Terrain. For the best Terrain-editing experience, use the Package Manager to additionally download the Terrain Tools preview package for 2019.1.
Asset uses "Terrain Height Data" under Open Data Commons Open Database License; see Third-Party Notices.txt file in package for details