Used external assets:
[Combine Normal Maps by Radcapricorn](https://www.blendswap.com/blends/view/76176),
[Sky Free by Wolf](https://3d-wolf.com/products/sky.html),
[The Grass Field by Spelle](https://www.blendswap.com/blends/view/74098)

Some free textures were used for an example(google drive):
[Van Elverdinghe Sebastien](https://gumroad.com/sebvhe),
[Danny](https://cubebrush.co/phlox?product_id=hajlaa),
[Poliigon.com](https://www.poliigon.com/texture/ground-forest-003 )

[Google Drive without textures](https://drive.google.com/open?id=1mIz8Pndlh_tEbIxAgltH04hff7bb4zVO),
[Google Drive with textures](https://drive.google.com/open?id=1Qop8viY4g2E1GF0JCEV5CFr25tWQdyBY)

[BlenderArtists thread](https://blenderartists.org/forum/showthread.php?444455-Height-Blend-Node)