Rock Pack Pro has 20 photo realistic rocks, created using Photogrammetry. (A form of scanning real world objects.) These rocks are 100% true reproductions of actual mountain rocks aka "Ballast".Each rock has the quality needed to look great on any platform, from PC to Android.The 6 supplied LODs allow for highly detailed extreme close up shots and low poly rocks that look great on mobile devices.Each Rock comes with individual PBR materials that brings out the finest detail including the shimmering mica particles.Each of the 20 Rocks have a moss or snow alternative material. The moss and snow build up is effected by world space and rotation. The moss and snow will build up on top of the rocks upward angled surfaces. Guaranteed no two moss or snow rocks will look the same.