Hi fellow Devs!
Quite a few people asked how we achieved the moss on the rock in our shader preview so I created a youtube tutorial covering how to do a material layer for moss in Unreal Engine 4.
Its world aligned, uses the normal map and “up” side of the mesh as a base and can be blended in or removed by parameters and vertex color.
Feel free to check it out and let me know what you think!
I hope this is useful to some of you.