Go to this link to download the scene file as well as the lighting and the production ready rock assets: https://gumroad.com/tomnewbury

This is a new and improved version of my old 'rock pile tutorial' where I use a new tool called MASH available in Maya 2016 Ext 2, to generate a convincing rock pile. This method can be used for a wide range of asset creation methods. It is a really simple approach to instancing and the best one I have found to date.