Worked on part of this section with Brian Recktenwald (modeler) as a texture artist and also modeling support. Mark Shoaf was our lighter in this area. Assets used here come from various artist also. We ended up creating modular 1 to 1 baked cliff segments in which we had tiling texture to add detail some images above of the pieces and than some examples of how it could be put together to make larger shapes.
Some of these chunks came from outsourcing or various artists though we came together to make sure all these modular cliff rocks were baked with the same standards and also had masks that added edge highlights and such, this was done through the use of substance designer.