Import the Unity package through the Asset Store download manager (Found under Window->Asset Store).
Meaning, if you upgrade from Unity 2017 to 2018+, you will have to re-download and import the package.
You may receive a warning message about obsolete APIs, it is completely safe to run the API updater.
warning CS0618: `UnityEngine.ProceduralMaterial’ is obsolete: `Built-in support for Substance Designer materials has been deprecated and will be removed in Unity 2018.1. To continue using Substance Designer materials in Unity 2018.1, you will need to install a suitable third-party external importer from the Asset Store.’
This is harmless, and unfortunately not something that can be solved in this version.
There are several demo scenes included:
FAE_Demo1: The main demo scene, which is intended to demonstrate the practical uses of the assets. In order to start building your world, you can browse the prefabs in the /Prefabs folder and use them as you see fit.
FAE_AssetOverview: A scene with all the assets lined up and their LODs
FAE_RocksDemo: All the rock assets showcased, and some best practice examples.
FAE_CliffCoverageDemo: A demo scene which makes use of the cliff coverage shader, and a demonstrates the use of a “coverage map”.
It’s important to note that the vegetation items will not work on the terrain as “Detail objects”. This is because they have LODs, which is incompatible. It is also undesirable to use the assets in this way, since the shader would be overridden by the built-in terrain grass shader.
Instead, add the vegetation items as “Tree Objects”. This also applies to assets like Gaia or Map Magic.