According to all camera views, the rock is up front, slightly to the right, and I even grouped it two different ways, both with the same result. I do see the sliver where the rock and the glass met, but it didn't take out the whole chunk for some reason. In the un AA'd version, there's like a partial crack in the glass, although I didn't do the "crack part" of the tutorial. (I couldn't get the first part to work right so didn't try that part...LOL I grouped everything just as he said, and got this result, so after I posted this, I tried, ungrouping everything, and grouping into one group instead of several, but that produced the same result...LOL