Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Forest Photoscan Optimised Free.
Forest Photoscan Optimised v1.6
Create your realistic forest!
This asset contains 34 optimized trunks,stumps and mushrooms
Version 1.0
asset contains 10 optimized trunks and stumps
Contain textures: Diffuse and Normal map Texture resolution 2048 х 2048
I wish you success in creating the forest!
Version 1.1
asset contains 2 optimiszed stumps.
Contain textures: Diffuse and Normal map Texture resolution 2048 х 2048
Version 1.2
asset contains 3 optimiszed stumps.
Contain textures: Diffuse and Normal map Texture resolution 2048 х 2048
Version 1.3
asset contains 4 optimiszed big wood.
Contain textures: Diffuse and Normal map
Texture resolution 2048 х 2048
Version 1.4
asset contains optimiszed :
3 stump
2 stick
Contain textures: Diffuse and Normal map
Texture resolution 2048 х 2048
Version 1.5
asset contains optimiszed :
4 Mushrooms
Contain textures: Diffuse and Normal map
Texture resolution 2048 х 2048
Version 1.6
asset contains optimiszed :
2 Mushrooms
Contain textures: Diffuse and Normal map
Texture resolution 2048 х 2048
Version 1.7
asset contains 4 optimiszed wood.
Contain textures: Diffuse and Normal map
Texture resolution 2048 х 2048
Also there is an asset with stones : http://u3d.as/LnE