For more detail this asset from the Unity Asset Store: Click Here
This is a paid asset, but now you can download Rock Cliff for FREE, Please keep in mind this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Rock Cliff v2.0
“If possible, please buy the package to support the developer”
Features:
This is a photo real rock surface that could also be rearranged in many ways, for example by duplicating the geometry and modifying it, adding deformers like “bend” or braking it down to several smaller elements and rearrange them in different ways.
Usage:
This geometry is meant to be used with a self illuminated shader also known as a “surface shader” or an “unlit shader” regardless if its used for films or games. Ideally you should choose the right balance of how much the geometry is being affected by lights in the scene.