This is an amazing pack of 5 terrains that are completely varied and can be used in a variety of ways. You can import the terrains directly into a game engine by using the height map or simply dragging and dropping the .obj files.
Also there is a bitmap file with each terrain so that you can map that onto the terrain itself, giving it its color and life.
There aren't any materials within this or textures as such, but again, there is one texture as a bitmap that covers the entire object. However, you may need to flip/rotate/invert the texture to get it right with the object.