Playing with Zbrush again

I finally got my ai kind of working and I started working on some art, but first I need to sharpen my skills. I've been lazy and obviously I became a little bit rusted so I working on zbrush new tools and in the process trying out the different way to creat art for my game. So there is a rock with 256 poly. I create a rock and then using the zphere I created a low poly version of it then project on a cleaner mesh.